64908817 has 4 divisors (see below), whose sum is σ = 64926576. Its totient is φ = 64891060.

The previous prime is 64908793. The next prime is 64908827. The reversal of 64908817 is 71880946.

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 64908817 - 2⁷ = 64908689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64908827) 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, 1159 + ... + 11452.

It is an arithmetic number, because the mean of its divisors is an integer number (16231644).

Almost surely, 2^64908817 is an apocalyptic number.

It is an amenable number.

64908817 is a deficient number, since it is larger than the sum of its proper divisors (17759).

64908817 is a wasteful number, since it uses less digits than its factorization.

64908817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17758.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 64908817 is about 8056.6008340987. The cubic root of 64908817 is about 401.8844766769.

The spelling of 64908817 in words is "sixty-four million, nine hundred eight thousand, eight hundred seventeen".