64812831 has 8 divisors (see below), whose sum is σ = 87601200. Its totient is φ = 42616512.

The previous prime is 64812829. The next prime is 64812871. The reversal of 64812831 is 13821846.

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

It is not a de Polignac number, because 64812831 - 2¹ = 64812829 is a prime.

It is a super-2 number, since 2×64812831² = 8401406124469122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64812792 and 64812801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64812871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147756 + ... + 148193.

It is an arithmetic number, because the mean of its divisors is an integer number (10950150).

Almost surely, 2^64812831 is an apocalyptic number.

64812831 is a deficient number, since it is larger than the sum of its proper divisors (22788369).

64812831 is a wasteful number, since it uses less digits than its factorization.

64812831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296025.

The product of its digits is 9216, while the sum is 33.

The square root of 64812831 is about 8050.6416514462. The cubic root of 64812831 is about 401.6862790842.

The spelling of 64812831 in words is "sixty-four million, eight hundred twelve thousand, eight hundred thirty-one".