65139377 has 2 divisors, whose sum is σ = 65139378. Its totient is φ = 65139376.

The previous prime is 65139337. The next prime is 65139383. The reversal of 65139377 is 77393156.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54745201 + 10394176 = 7399^2 + 3224^2 .

It is a cyclic number.

It is not a de Polignac number, because 65139377 - 2¹⁸ = 64877233 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65139337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32569688 + 32569689.

It is an arithmetic number, because the mean of its divisors is an integer number (32569689).

Almost surely, 2^65139377 is an apocalyptic number.

It is an amenable number.

65139377 is a deficient number, since it is larger than the sum of its proper divisors (1).

65139377 is an equidigital number, since it uses as much as digits as its factorization.

65139377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 119070, while the sum is 41.

The square root of 65139377 is about 8070.8969142221. The cubic root of 65139377 is about 402.3597536152.

The spelling of 65139377 in words is "sixty-five million, one hundred thirty-nine thousand, three hundred seventy-seven".