64900391 has 8 divisors (see below), whose sum is σ = 67152384. Its totient is φ = 62658360.

The previous prime is 64900343. The next prime is 64900397. The reversal of 64900391 is 19300946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64900391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64900397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12236 + ... + 16718.

It is an arithmetic number, because the mean of its divisors is an integer number (8394048).

Almost surely, 2^64900391 is an apocalyptic number.

64900391 is a deficient number, since it is larger than the sum of its proper divisors (2251993).

64900391 is a wasteful number, since it uses less digits than its factorization.

64900391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4981.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 64900391 is about 8056.0778918777. The cubic root of 64900391 is about 401.8670859983.

The spelling of 64900391 in words is "sixty-four million, nine hundred thousand, three hundred ninety-one".