265039139 has 2 divisors, whose sum is σ = 265039140. Its totient is φ = 265039138.

The previous prime is 265039111. The next prime is 265039147. The reversal of 265039139 is 931930562.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 265039139 - 2¹⁶ = 264973603 is a prime.

It is a super-2 number, since 2×265039139² = 140491490403722642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (265039199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132519569 + 132519570.

It is an arithmetic number, because the mean of its divisors is an integer number (132519570).

Almost surely, 2^265039139 is an apocalyptic number.

265039139 is a deficient number, since it is larger than the sum of its proper divisors (1).

265039139 is an equidigital number, since it uses as much as digits as its factorization.

265039139 is an odious number, because the sum of its binary digits is odd.

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

The square root of 265039139 is about 16280.0226965444. The cubic root of 265039139 is about 642.3474494370.

The spelling of 265039139 in words is "two hundred sixty-five million, thirty-nine thousand, one hundred thirty-nine".