13991158 has 8 divisors (see below), whose sum is σ = 21003552. Its totient is φ = 6989976.

The previous prime is 13991147. The next prime is 13991167. The reversal of 13991158 is 85119931.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1891 + ... + 5617.

It is an arithmetic number, because the mean of its divisors is an integer number (2625444).

Almost surely, 2^13991158 is an apocalyptic number.

13991158 is a deficient number, since it is larger than the sum of its proper divisors (7012394).

13991158 is a wasteful number, since it uses less digits than its factorization.

13991158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5606.

The product of its digits is 9720, while the sum is 37.

The square root of 13991158 is about 3740.4756382043. The cubic root of 13991158 is about 240.9634764989.

The spelling of 13991158 in words is "thirteen million, nine hundred ninety-one thousand, one hundred fifty-eight".