11919557 has 8 divisors (see below), whose sum is σ = 13135584. Its totient is φ = 10746288.

The previous prime is 11919539. The next prime is 11919563. The reversal of 11919557 is 75591911.

11919557 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11919557 - 2⁸ = 11919301 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11919557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11919157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10103 + ... + 11220.

It is an arithmetic number, because the mean of its divisors is an integer number (1641948).

Almost surely, 2^11919557 is an apocalyptic number.

It is an amenable number.

11919557 is a deficient number, since it is larger than the sum of its proper divisors (1216027).

11919557 is a wasteful number, since it uses less digits than its factorization.

11919557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21379.

The product of its digits is 14175, while the sum is 38.

The square root of 11919557 is about 3452.4711439779. The cubic root of 11919557 is about 228.4301219419.

The spelling of 11919557 in words is "eleven million, nine hundred nineteen thousand, five hundred fifty-seven".