11919697 has 4 divisors (see below), whose sum is σ = 11958336. Its totient is φ = 11881060.

The previous prime is 11919683. The next prime is 11919709. The reversal of 11919697 is 79691911.

It is a happy number.

11919697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11919697 - 2⁷ = 11919569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11919637) 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, 18853 + ... + 19474.

It is an arithmetic number, because the mean of its divisors is an integer number (2989584).

Almost surely, 2^11919697 is an apocalyptic number.

It is an amenable number.

11919697 is a deficient number, since it is larger than the sum of its proper divisors (38639).

11919697 is an equidigital number, since it uses as much as digits as its factorization.

11919697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38638.

The product of its digits is 30618, while the sum is 43.

The square root of 11919697 is about 3452.4914192507. The cubic root of 11919697 is about 228.4310162730.

The spelling of 11919697 in words is "eleven million, nine hundred nineteen thousand, six hundred ninety-seven".