11519997 has 4 divisors (see below), whose sum is σ = 15360000. Its totient is φ = 7679996.

The previous prime is 11519983. The next prime is 11520013. The reversal of 11519997 is 79991511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11519997 - 2⁶ = 11519933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11519917) 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, 1919997 + ... + 1920002.

It is an arithmetic number, because the mean of its divisors is an integer number (3840000).

Almost surely, 2^11519997 is an apocalyptic number.

It is an amenable number.

11519997 is a deficient number, since it is larger than the sum of its proper divisors (3840003).

11519997 is an equidigital number, since it uses as much as digits as its factorization.

11519997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3840002.

The product of its digits is 25515, while the sum is 42.

The square root of 11519997 is about 3394.1121077537. The cubic root of 11519997 is about 225.8486273265.

The spelling of 11519997 in words is "eleven million, five hundred nineteen thousand, nine hundred ninety-seven".