64394433 has 10 divisors (see below), whose sum is σ = 96194274. Its totient is φ = 42929568.

The previous prime is 64394431. The next prime is 64394441. The reversal of 64394433 is 33449346.

It is a happy number.

64394433 is a `hidden beast` number, since 643 + 9 + 4 + 4 + 3 + 3 = 666.

64394433 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 52881984 + 11512449 = 7272^2 + 3393^2 .

It is not a de Polignac number, because 64394433 - 2¹ = 64394431 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64394431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 397416 + ... + 397577.

Almost surely, 2^64394433 is an apocalyptic number.

It is an amenable number.

64394433 is a deficient number, since it is larger than the sum of its proper divisors (31799841).

64394433 is an equidigital number, since it uses as much as digits as its factorization.

64394433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795005 (or 794996 counting only the distinct ones).

The product of its digits is 93312, while the sum is 36.

The square root of 64394433 is about 8024.6141963337. The cubic root of 64394433 is about 400.8200530502.

The spelling of 64394433 in words is "sixty-four million, three hundred ninety-four thousand, four hundred thirty-three".