11915917 has 8 divisors (see below), whose sum is σ = 12902400. Its totient is φ = 10939440.

The previous prime is 11915903. The next prime is 11915927. The reversal of 11915917 is 71951911.

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 11915917 - 2¹⁵ = 11883149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11915927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84 + ... + 4882.

It is an arithmetic number, because the mean of its divisors is an integer number (1612800).

Almost surely, 2^11915917 is an apocalyptic number.

It is an amenable number.

11915917 is a deficient number, since it is larger than the sum of its proper divisors (986483).

11915917 is a wasteful number, since it uses less digits than its factorization.

11915917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5003.

The product of its digits is 2835, while the sum is 34.

The square root of 11915917 is about 3451.9439450837. The cubic root of 11915917 is about 228.4068668747.

The spelling of 11915917 in words is "eleven million, nine hundred fifteen thousand, nine hundred seventeen".