11889913 has 16 divisors (see below), whose sum is σ = 14446080. Its totient is φ = 9567936.

The previous prime is 11889901. The next prime is 11889923. The reversal of 11889913 is 31998811.

It is a happy number.

It is not a de Polignac number, because 11889913 - 2⁹ = 11889401 is a prime.

It is a super-2 number, since 2×11889913² = 282740062295138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11889923) 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, 6720 + ... + 8302.

It is an arithmetic number, because the mean of its divisors is an integer number (902880).

Almost surely, 2^11889913 is an apocalyptic number.

It is an amenable number.

11889913 is a deficient number, since it is larger than the sum of its proper divisors (2556167).

11889913 is a wasteful number, since it uses less digits than its factorization.

11889913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656.

The product of its digits is 15552, while the sum is 40.

The square root of 11889913 is about 3448.1753145686. The cubic root of 11889913 is about 228.2405957719.

The spelling of 11889913 in words is "eleven million, eight hundred eighty-nine thousand, nine hundred thirteen".