65921137 has 2 divisors, whose sum is σ = 65921138. Its totient is φ = 65921136.

The previous prime is 65921123. The next prime is 65921179. The reversal of 65921137 is 73112956.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63218401 + 2702736 = 7951^2 + 1644^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65921137 is a prime.

It is equal to p_3891706 and since 65921137 and 3891706 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (65921237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32960568 + 32960569.

It is an arithmetic number, because the mean of its divisors is an integer number (32960569).

Almost surely, 2^65921137 is an apocalyptic number.

It is an amenable number.

65921137 is a deficient number, since it is larger than the sum of its proper divisors (1).

65921137 is an equidigital number, since it uses as much as digits as its factorization.

65921137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340, while the sum is 34.

The square root of 65921137 is about 8119.1832717337. The cubic root of 65921137 is about 403.9629761353.

The spelling of 65921137 in words is "sixty-five million, nine hundred twenty-one thousand, one hundred thirty-seven".