64136173 has 2 divisors, whose sum is σ = 64136174. Its totient is φ = 64136172.

The previous prime is 64136131. The next prime is 64136203. The reversal of 64136173 is 37163146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44262409 + 19873764 = 6653^2 + 4458^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64136173 is a prime.

It is a super-2 number, since 2×64136173² = 8226897374171858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64136113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32068086 + 32068087.

It is an arithmetic number, because the mean of its divisors is an integer number (32068087).

Almost surely, 2^64136173 is an apocalyptic number.

It is an amenable number.

64136173 is a deficient number, since it is larger than the sum of its proper divisors (1).

64136173 is an equidigital number, since it uses as much as digits as its factorization.

64136173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 31.

The square root of 64136173 is about 8008.5062901892. The cubic root of 64136173 is about 400.2834927821.

The spelling of 64136173 in words is "sixty-four million, one hundred thirty-six thousand, one hundred seventy-three".