64980319 has 4 divisors (see below), whose sum is σ = 65011896. Its totient is φ = 64948744.

The previous prime is 64980317. The next prime is 64980343. The reversal of 64980319 is 91308946.

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

It is a cyclic number.

It is not a de Polignac number, because 64980319 - 2¹ = 64980317 is a prime.

It is a super-2 number, since 2×64980319² = 8444883714683522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64980317) 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, 12469 + ... + 16894.

It is an arithmetic number, because the mean of its divisors is an integer number (16252974).

Almost surely, 2^64980319 is an apocalyptic number.

64980319 is a deficient number, since it is larger than the sum of its proper divisors (31577).

64980319 is a wasteful number, since it uses less digits than its factorization.

64980319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31576.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 64980319 is about 8061.0370920868. The cubic root of 64980319 is about 402.0319912991.

The spelling of 64980319 in words is "sixty-four million, nine hundred eighty thousand, three hundred nineteen".