64790531 has 4 divisors (see below), whose sum is σ = 69774432. Its totient is φ = 59806632.

The previous prime is 64790503. The next prime is 64790549. The reversal of 64790531 is 13509746.

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 64790531 - 2¹⁰ = 64789507 is a prime.

It is a super-2 number, since 2×64790531² = 8395625814523922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64790491 and 64790500.

It is not an unprimeable number, because it can be changed into a prime (64790431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2491931 + ... + 2491956.

It is an arithmetic number, because the mean of its divisors is an integer number (17443608).

Almost surely, 2^64790531 is an apocalyptic number.

64790531 is a deficient number, since it is larger than the sum of its proper divisors (4983901).

64790531 is a wasteful number, since it uses less digits than its factorization.

64790531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4983900.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 64790531 is about 8049.2565495206. The cubic root of 64790531 is about 401.6402047117.

The spelling of 64790531 in words is "sixty-four million, seven hundred ninety thousand, five hundred thirty-one".