265440979 has 2 divisors, whose sum is σ = 265440980. Its totient is φ = 265440978.

The previous prime is 265440971. The next prime is 265441063. The reversal of 265440979 is 979044562.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 265440979 - 2³ = 265440971 is a prime.

It is not a weakly prime, because it can be changed into another prime (265440971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132720489 + 132720490.

It is an arithmetic number, because the mean of its divisors is an integer number (132720490).

Almost surely, 2^265440979 is an apocalyptic number.

265440979 is a deficient number, since it is larger than the sum of its proper divisors (1).

265440979 is an equidigital number, since it uses as much as digits as its factorization.

265440979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 46.

The square root of 265440979 is about 16292.3595283188. The cubic root of 265440979 is about 642.6719179406.

The spelling of 265440979 in words is "two hundred sixty-five million, four hundred forty thousand, nine hundred seventy-nine".