65124139 has 2 divisors, whose sum is σ = 65124140. Its totient is φ = 65124138.

The previous prime is 65124133. The next prime is 65124173. The reversal of 65124139 is 93142156.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65124139 - 2³ = 65124131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65124139.

It is not a weakly prime, because it can be changed into another prime (65124131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32562069 + 32562070.

It is an arithmetic number, because the mean of its divisors is an integer number (32562070).

Almost surely, 2^65124139 is an apocalyptic number.

65124139 is a deficient number, since it is larger than the sum of its proper divisors (1).

65124139 is an equidigital number, since it uses as much as digits as its factorization.

65124139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 31.

The square root of 65124139 is about 8069.9528499242. The cubic root of 65124139 is about 402.3283766082.

The spelling of 65124139 in words is "sixty-five million, one hundred twenty-four thousand, one hundred thirty-nine".