265989013 has 8 divisors (see below), whose sum is σ = 272465600. Its totient is φ = 259525728.

The previous prime is 265989011. The next prime is 265989019. The reversal of 265989013 is 310989562.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 265989013 - 2¹ = 265989011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265989011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45808 + ... + 51286.

It is an arithmetic number, because the mean of its divisors is an integer number (34058200).

Almost surely, 2^265989013 is an apocalyptic number.

It is an amenable number.

265989013 is a deficient number, since it is larger than the sum of its proper divisors (6476587).

265989013 is a wasteful number, since it uses less digits than its factorization.

265989013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6651.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 265989013 is about 16309.1695987257. The cubic root of 265989013 is about 643.1139043923.

The spelling of 265989013 in words is "two hundred sixty-five million, nine hundred eighty-nine thousand, thirteen".