64199137 has 2 divisors, whose sum is σ = 64199138. Its totient is φ = 64199136.

The previous prime is 64199131. The next prime is 64199167. The reversal of 64199137 is 73199146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62346816 + 1852321 = 7896^2 + 1361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64199137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64199137.

It is not a weakly prime, because it can be changed into another prime (64199131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32099568 + 32099569.

It is an arithmetic number, because the mean of its divisors is an integer number (32099569).

Almost surely, 2^64199137 is an apocalyptic number.

It is an amenable number.

64199137 is a deficient number, since it is larger than the sum of its proper divisors (1).

64199137 is an equidigital number, since it uses as much as digits as its factorization.

64199137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 40.

The square root of 64199137 is about 8012.4363960034. The cubic root of 64199137 is about 400.4144392021.

Subtracting 64199137 from its reverse (73199146), we obtain a palindrome (9000009).

The spelling of 64199137 in words is "sixty-four million, one hundred ninety-nine thousand, one hundred thirty-seven".