11691513 has 16 divisors (see below), whose sum is σ = 17427840. Its totient is φ = 7746192.

The previous prime is 11691509. The next prime is 11691539. The reversal of 11691513 is 31519611.

It is not a de Polignac number, because 11691513 - 2² = 11691509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (11691413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3420 + ... + 5922.

It is an arithmetic number, because the mean of its divisors is an integer number (1089240).

Almost surely, 2^11691513 is an apocalyptic number.

It is an amenable number.

11691513 is a deficient number, since it is larger than the sum of its proper divisors (5736327).

11691513 is a wasteful number, since it uses less digits than its factorization.

11691513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2685 (or 2679 counting only the distinct ones).

The product of its digits is 810, while the sum is 27.

The square root of 11691513 is about 3419.2854516697. The cubic root of 11691513 is about 226.9639627889.

The spelling of 11691513 in words is "eleven million, six hundred ninety-one thousand, five hundred thirteen".