64331693 has 2 divisors, whose sum is σ = 64331694. Its totient is φ = 64331692.

The previous prime is 64331677. The next prime is 64331711. The reversal of 64331693 is 39613346.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63712324 + 619369 = 7982^2 + 787^2 .

It is a cyclic number.

It is not a de Polignac number, because 64331693 - 2⁴ = 64331677 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64331623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32165846 + 32165847.

It is an arithmetic number, because the mean of its divisors is an integer number (32165847).

Almost surely, 2^64331693 is an apocalyptic number.

It is an amenable number.

64331693 is a deficient number, since it is larger than the sum of its proper divisors (1).

64331693 is an equidigital number, since it uses as much as digits as its factorization.

64331693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 35.

The square root of 64331693 is about 8020.7040214684. The cubic root of 64331693 is about 400.6898367127.

The spelling of 64331693 in words is "sixty-four million, three hundred thirty-one thousand, six hundred ninety-three".