64112981 has 2 divisors, whose sum is σ = 64112982. Its totient is φ = 64112980.

The previous prime is 64112977. The next prime is 64113031. The reversal of 64112981 is 18921146.

64112981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39262756 + 24850225 = 6266^2 + 4985^2 .

It is a cyclic number.

It is not a de Polignac number, because 64112981 - 2² = 64112977 is a prime.

It is a super-2 number, since 2×64112981² = 8220948665412722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64112911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32056490 + 32056491.

It is an arithmetic number, because the mean of its divisors is an integer number (32056491).

Almost surely, 2^64112981 is an apocalyptic number.

It is an amenable number.

64112981 is a deficient number, since it is larger than the sum of its proper divisors (1).

64112981 is an equidigital number, since it uses as much as digits as its factorization.

64112981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 32.

The square root of 64112981 is about 8007.0581988643. The cubic root of 64112981 is about 400.2352387131.

It can be divided in two parts, 6411 and 2981, that multiplied together give a palindrome (19111191).

The spelling of 64112981 in words is "sixty-four million, one hundred twelve thousand, nine hundred eighty-one".