11815797 has 16 divisors (see below), whose sum is σ = 18224640. Its totient is φ = 6669552.

The previous prime is 11815781. The next prime is 11815819. The reversal of 11815797 is 79751811.

It is not a de Polignac number, because 11815797 - 2⁴ = 11815781 is a prime.

It is a super-2 number, since 2×11815797² = 279226117490418, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11815717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1647 + ... + 5132.

It is an arithmetic number, because the mean of its divisors is an integer number (1139040).

Almost surely, 2^11815797 is an apocalyptic number.

It is an amenable number.

11815797 is a deficient number, since it is larger than the sum of its proper divisors (6408843).

11815797 is an equidigital number, since it uses as much as digits as its factorization.

11815797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6872.

The product of its digits is 17640, while the sum is 39.

The square root of 11815797 is about 3437.4113806759. The cubic root of 11815797 is about 227.7653595627.

The spelling of 11815797 in words is "eleven million, eight hundred fifteen thousand, seven hundred ninety-seven".