64185137 has 2 divisors, whose sum is σ = 64185138. Its totient is φ = 64185136.

The previous prime is 64185119. The next prime is 64185151. The reversal of 64185137 is 73158146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62236321 + 1948816 = 7889^2 + 1396^2 .

It is a cyclic number.

It is not a de Polignac number, because 64185137 - 2⁶ = 64185073 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 64185097 and 64185106.

It is not a weakly prime, because it can be changed into another prime (64185337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32092568 + 32092569.

It is an arithmetic number, because the mean of its divisors is an integer number (32092569).

Almost surely, 2^64185137 is an apocalyptic number.

It is an amenable number.

64185137 is a deficient number, since it is larger than the sum of its proper divisors (1).

64185137 is an equidigital number, since it uses as much as digits as its factorization.

64185137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 35.

The square root of 64185137 is about 8011.5627064887. The cubic root of 64185137 is about 400.3853307646.

The spelling of 64185137 in words is "sixty-four million, one hundred eighty-five thousand, one hundred thirty-seven".