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444506981 = 931947699
BaseRepresentation
bin11010011111101…
…010001101100101
31010222102021221112
4122133222031211
51402243210411
6112035154405
714005150502
oct3237521545
91128367845
10444506981
11208a04746
12104a45a05
13711256a9
144306c4a9
1529055b8b
hex1a7ea365

444506981 has 4 divisors (see below), whose sum is σ = 444564000. Its totient is φ = 444449964.

The previous prime is 444506971. The next prime is 444507017. The reversal of 444506981 is 189605444.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 444506981 - 218 = 444244837 is a prime.

It is a super-2 number, since 2×4445069812 = 395172912315468722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444506921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14531 + ... + 33168.

It is an arithmetic number, because the mean of its divisors is an integer number (111141000).

Almost surely, 2444506981 is an apocalyptic number.

It is an amenable number.

444506981 is a deficient number, since it is larger than the sum of its proper divisors (57019).

444506981 is an equidigital number, since it uses as much as digits as its factorization.

444506981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57018.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 444506981 is about 21083.3342002635. The cubic root of 444506981 is about 763.1786199331.

The spelling of 444506981 in words is "four hundred forty-four million, five hundred six thousand, nine hundred eighty-one".

Divisors: 1 9319 47699 444506981