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64443049 = 115858459
BaseRepresentation
bin1111010111010…
…1001010101001
311111021001020121
43311311022221
5112444134144
610221123241
71411520416
oct365651251
9144231217
1064443049
1133416020
12196b9521
13104743a8
1487b710d
1559ce384
hex3d752a9

64443049 has 4 divisors (see below), whose sum is σ = 70301520. Its totient is φ = 58584580.

The previous prime is 64442999. The next prime is 64443053. The reversal of 64443049 is 94034446.

It is a happy number.

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 64443049 - 27 = 64442921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64443149) 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, 2929219 + ... + 2929240.

It is an arithmetic number, because the mean of its divisors is an integer number (17575380).

Almost surely, 264443049 is an apocalyptic number.

It is an amenable number.

64443049 is a deficient number, since it is larger than the sum of its proper divisors (5858471).

64443049 is a wasteful number, since it uses less digits than its factorization.

64443049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5858470.

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 64443049 is about 8027.6428047092. The cubic root of 64443049 is about 400.9208969948.

The spelling of 64443049 in words is "sixty-four million, four hundred forty-three thousand, forty-nine".

Divisors: 1 11 5858459 64443049