64687037 has 2 divisors, whose sum is σ = 64687038. Its totient is φ = 64687036.

The previous prime is 64687027. The next prime is 64687079. The reversal of 64687037 is 73078646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63457156 + 1229881 = 7966^2 + 1109^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64687037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64686985 and 64687003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64687027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32343518 + 32343519.

It is an arithmetic number, because the mean of its divisors is an integer number (32343519).

Almost surely, 2^64687037 is an apocalyptic number.

It is an amenable number.

64687037 is a deficient number, since it is larger than the sum of its proper divisors (1).

64687037 is an equidigital number, since it uses as much as digits as its factorization.

64687037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 41.

The square root of 64687037 is about 8042.8251877061. The cubic root of 64687037 is about 401.4262356688.

The spelling of 64687037 in words is "sixty-four million, six hundred eighty-seven thousand, thirty-seven".