265989493 has 36 divisors (see below), whose sum is σ = 356506272. Its totient is φ = 196212240.

The previous prime is 265989491. The next prime is 265989511. The reversal of 265989493 is 394989562.

It is a happy number.

It is not a de Polignac number, because 265989493 - 2¹ = 265989491 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265989491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 193896 + ... + 195262.

It is an arithmetic number, because the mean of its divisors is an integer number (9902952).

Almost surely, 2^265989493 is an apocalyptic number.

It is an amenable number.

265989493 is a deficient number, since it is larger than the sum of its proper divisors (90516779).

265989493 is a wasteful number, since it uses less digits than its factorization.

265989493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1430 (or 1404 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 55.

The square root of 265989493 is about 16309.1843143672. The cubic root of 265989493 is about 643.1142912435.

The spelling of 265989493 in words is "two hundred sixty-five million, nine hundred eighty-nine thousand, four hundred ninety-three".