65687137 has 2 divisors, whose sum is σ = 65687138. Its totient is φ = 65687136.

The previous prime is 65687129. The next prime is 65687177. The reversal of 65687137 is 73178656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65674816 + 12321 = 8104^2 + 111^2 .

It is a cyclic number.

It is not a de Polignac number, because 65687137 - 2³ = 65687129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65687093 and 65687102.

It is not a weakly prime, because it can be changed into another prime (65687177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32843568 + 32843569.

It is an arithmetic number, because the mean of its divisors is an integer number (32843569).

Almost surely, 2^65687137 is an apocalyptic number.

It is an amenable number.

65687137 is a deficient number, since it is larger than the sum of its proper divisors (1).

65687137 is an equidigital number, since it uses as much as digits as its factorization.

65687137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 43.

The square root of 65687137 is about 8104.7601445077. The cubic root of 65687137 is about 403.4844275261.

The spelling of 65687137 in words is "sixty-five million, six hundred eighty-seven thousand, one hundred thirty-seven".