64634131 has 2 divisors, whose sum is σ = 64634132. Its totient is φ = 64634130.

The previous prime is 64634111. The next prime is 64634149. The reversal of 64634131 is 13143646.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64634131 is a prime.

It is a super-2 number, since 2×64634131² = 8355141780250322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64634131.

It is not a weakly prime, because it can be changed into another prime (64634111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32317065 + 32317066.

It is an arithmetic number, because the mean of its divisors is an integer number (32317066).

Almost surely, 2^64634131 is an apocalyptic number.

64634131 is a deficient number, since it is larger than the sum of its proper divisors (1).

64634131 is an equidigital number, since it uses as much as digits as its factorization.

64634131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 28.

The square root of 64634131 is about 8039.5354965321. The cubic root of 64634131 is about 401.3167668065.

Adding to 64634131 its reverse (13143646), we get a palindrome (77777777).

The spelling of 64634131 in words is "sixty-four million, six hundred thirty-four thousand, one hundred thirty-one".