11779965 has 32 divisors (see below), whose sum is σ = 21254400. Its totient is φ = 6189120.

The previous prime is 11779961. The next prime is 11779967. The reversal of 11779965 is 56997711.

It is not a de Polignac number, because 11779965 - 2² = 11779961 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 11779965.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11779961) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8971 + ... + 10199.

It is an arithmetic number, because the mean of its divisors is an integer number (664200).

Almost surely, 2^11779965 is an apocalyptic number.

11779965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11779965 is a deficient number, since it is larger than the sum of its proper divisors (9474435).

11779965 is a wasteful number, since it uses less digits than its factorization.

11779965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314 (or 1308 counting only the distinct ones).

The product of its digits is 119070, while the sum is 45.

The square root of 11779965 is about 3432.1953615725. The cubic root of 11779965 is about 227.5348897905.

The spelling of 11779965 in words is "eleven million, seven hundred seventy-nine thousand, nine hundred sixty-five".