64000031 has 2 divisors, whose sum is σ = 64000032. Its totient is φ = 64000030.

The previous prime is 63999979. The next prime is 64000043. The reversal of 64000031 is 13000046.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64000031 - 2⁶ = 63999967 is a prime.

It is a super-2 number, since 2×64000031² = 8192007936001922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64000051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32000015 + 32000016.

It is an arithmetic number, because the mean of its divisors is an integer number (32000016).

Almost surely, 2^64000031 is an apocalyptic number.

64000031 is a deficient number, since it is larger than the sum of its proper divisors (1).

64000031 is an equidigital number, since it uses as much as digits as its factorization.

64000031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 64000031 is about 8000.0019374998. The cubic root of 64000031 is about 400.0000645833. Note that the first 4 decimals are identical.

Adding to 64000031 its reverse (13000046), we get a palindrome (77000077).

The spelling of 64000031 in words is "sixty-four million, thirty-one", and thus it is an aban number.