65391239 has 2 divisors, whose sum is σ = 65391240. Its totient is φ = 65391238.

The previous prime is 65391191. The next prime is 65391251. The reversal of 65391239 is 93219356.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65391239 - 2¹⁶ = 65325703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65394239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32695619 + 32695620.

It is an arithmetic number, because the mean of its divisors is an integer number (32695620).

Almost surely, 2^65391239 is an apocalyptic number.

65391239 is a deficient number, since it is larger than the sum of its proper divisors (1).

65391239 is an equidigital number, since it uses as much as digits as its factorization.

65391239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43740, while the sum is 38.

The square root of 65391239 is about 8086.4849594864. The cubic root of 65391239 is about 402.8776625832.

The spelling of 65391239 in words is "sixty-five million, three hundred ninety-one thousand, two hundred thirty-nine".