11899947 has 32 divisors (see below), whose sum is σ = 18086400. Its totient is φ = 6918912.

The previous prime is 11899933. The next prime is 11899967. The reversal of 11899947 is 74999811.

11899947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11899947 - 2¹⁵ = 11867179 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11899896 and 11899905.

It is not an unprimeable number, because it can be changed into a prime (11899967) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37863 + ... + 38175.

It is an arithmetic number, because the mean of its divisors is an integer number (565200).

Almost surely, 2^11899947 is an apocalyptic number.

11899947 is a deficient number, since it is larger than the sum of its proper divisors (6186453).

11899947 is a wasteful number, since it uses less digits than its factorization.

11899947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387.

The product of its digits is 163296, while the sum is 48.

The square root of 11899947 is about 3449.6299801573. The cubic root of 11899947 is about 228.3047824544.

The spelling of 11899947 in words is "eleven million, eight hundred ninety-nine thousand, nine hundred forty-seven".