64904089 has 4 divisors (see below), whose sum is σ = 64922724. Its totient is φ = 64885456.

The previous prime is 64904083. The next prime is 64904101. The reversal of 64904089 is 98040946.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23687689 + 41216400 = 4867^2 + 6420^2 .

It is a cyclic number.

It is not a de Polignac number, because 64904089 - 2²⁵ = 31349657 is a prime.

It is a super-3 number, since 3×64904089³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64904083) 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, 2362 + ... + 11635.

It is an arithmetic number, because the mean of its divisors is an integer number (16230681).

Almost surely, 2^64904089 is an apocalyptic number.

It is an amenable number.

64904089 is a deficient number, since it is larger than the sum of its proper divisors (18635).

64904089 is a wasteful number, since it uses less digits than its factorization.

64904089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18634.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 64904089 is about 8056.3074047606. The cubic root of 64904089 is about 401.8747185987.

The spelling of 64904089 in words is "sixty-four million, nine hundred four thousand, eighty-nine".