11972913 has 16 divisors (see below), whose sum is σ = 17450496. Its totient is φ = 7269120.

The previous prime is 11972899. The next prime is 11972953. The reversal of 11972913 is 31927911.

11972913 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11972913 - 2²⁰ = 10924337 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11972953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2206 + ... + 5367.

It is an arithmetic number, because the mean of its divisors is an integer number (1090656).

Almost surely, 2^11972913 is an apocalyptic number.

It is an amenable number.

11972913 is a deficient number, since it is larger than the sum of its proper divisors (5477583).

11972913 is a wasteful number, since it uses less digits than its factorization.

11972913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7624.

The product of its digits is 3402, while the sum is 33.

The square root of 11972913 is about 3460.1897346822. The cubic root of 11972913 is about 228.7704583213.

The spelling of 11972913 in words is "eleven million, nine hundred seventy-two thousand, nine hundred thirteen".