11891315 has 4 divisors (see below), whose sum is σ = 14269584. Its totient is φ = 9513048.

The previous prime is 11891303. The next prime is 11891323. The reversal of 11891315 is 51319811.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11891315 - 2⁶ = 11891251 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1189127 + ... + 1189136.

It is an arithmetic number, because the mean of its divisors is an integer number (3567396).

Almost surely, 2^11891315 is an apocalyptic number.

11891315 is a deficient number, since it is larger than the sum of its proper divisors (2378269).

11891315 is an equidigital number, since it uses as much as digits as its factorization.

11891315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2378268.

The product of its digits is 1080, while the sum is 29.

The square root of 11891315 is about 3448.3786045039. The cubic root of 11891315 is about 228.2495664218.

The spelling of 11891315 in words is "eleven million, eight hundred ninety-one thousand, three hundred fifteen".