65250139 has 2 divisors, whose sum is σ = 65250140. Its totient is φ = 65250138.

The previous prime is 65250137. The next prime is 65250169. The reversal of 65250139 is 93105256.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65250139 - 2¹ = 65250137 is a prime.

Together with 65250137, it forms a pair of twin primes.

It is equal to p_3854407 and since 65250139 and 3854407 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65250139.

It is not a weakly prime, because it can be changed into another prime (65250137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32625069 + 32625070.

It is an arithmetic number, because the mean of its divisors is an integer number (32625070).

Almost surely, 2^65250139 is an apocalyptic number.

65250139 is a deficient number, since it is larger than the sum of its proper divisors (1).

65250139 is an equidigital number, since it uses as much as digits as its factorization.

65250139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 65250139 is about 8077.7558145812. The cubic root of 65250139 is about 402.5876799328.

The spelling of 65250139 in words is "sixty-five million, two hundred fifty thousand, one hundred thirty-nine".