11170897919 has 4 divisors (see below), whose sum is σ = 11175556800. Its totient is φ = 11166239040.

The previous prime is 11170897891. The next prime is 11170897921. The reversal of 11170897919 is 91979807111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91979807111 = 71 ⋅1295490241.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11170897919 is a prime.

It is a super-2 number, since 2×11170897919² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11170897939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2325842 + ... + 2330639.

It is an arithmetic number, because the mean of its divisors is an integer number (2793889200).

Almost surely, 2^11170897919 is an apocalyptic number.

11170897919 is a deficient number, since it is larger than the sum of its proper divisors (4658881).

11170897919 is an equidigital number, since it uses as much as digits as its factorization.

11170897919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4658880.

The product of its (nonzero) digits is 285768, while the sum is 53.

The spelling of 11170897919 in words is "eleven billion, one hundred seventy million, eight hundred ninety-seven thousand, nine hundred nineteen".