444747913 has 4 divisors (see below), whose sum is σ = 445264128. Its totient is φ = 444231700.

The previous prime is 444747911. The next prime is 444747971. The reversal of 444747913 is 319747444.

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 444747913 - 2¹ = 444747911 is a prime.

It is a super-2 number, since 2×444747913² = 395601412235711138, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 444747913.

It is not an unprimeable number, because it can be changed into a prime (444747911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256813 + ... + 258538.

It is an arithmetic number, because the mean of its divisors is an integer number (111316032).

Almost surely, 2^444747913 is an apocalyptic number.

It is an amenable number.

444747913 is a deficient number, since it is larger than the sum of its proper divisors (516215).

444747913 is an equidigital number, since it uses as much as digits as its factorization.

444747913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516214.

The product of its digits is 338688, while the sum is 43.

The square root of 444747913 is about 21089.0472283600. The cubic root of 444747913 is about 763.3164812401.

The spelling of 444747913 in words is "four hundred forty-four million, seven hundred forty-seven thousand, nine hundred thirteen".