65602139 has 2 divisors, whose sum is σ = 65602140. Its totient is φ = 65602138.

The previous prime is 65602093. The next prime is 65602151. The reversal of 65602139 is 93120656.

It is a happy number.

65602139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65602139 is a prime.

It is not a weakly prime, because it can be changed into another prime (65602189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32801069 + 32801070.

It is an arithmetic number, because the mean of its divisors is an integer number (32801070).

Almost surely, 2^65602139 is an apocalyptic number.

65602139 is a deficient number, since it is larger than the sum of its proper divisors (1).

65602139 is an equidigital number, since it uses as much as digits as its factorization.

65602139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 65602139 is about 8099.5147385507. The cubic root of 65602139 is about 403.3103184888.

The spelling of 65602139 in words is "sixty-five million, six hundred two thousand, one hundred thirty-nine".