265404091 has 2 divisors, whose sum is σ = 265404092. Its totient is φ = 265404090.

The previous prime is 265404089. The next prime is 265404149. The reversal of 265404091 is 190404562.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 265404091 - 2¹ = 265404089 is a prime.

Together with 265404089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (265404031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132702045 + 132702046.

It is an arithmetic number, because the mean of its divisors is an integer number (132702046).

Almost surely, 2^265404091 is an apocalyptic number.

265404091 is a deficient number, since it is larger than the sum of its proper divisors (1).

265404091 is an equidigital number, since it uses as much as digits as its factorization.

265404091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 265404091 is about 16291.2274245988. The cubic root of 265404091 is about 642.6421461246.

The spelling of 265404091 in words is "two hundred sixty-five million, four hundred four thousand, ninety-one".