13991007 has 16 divisors (see below), whose sum is σ = 19348992. Its totient is φ = 8986560.

The previous prime is 13990987. The next prime is 13991009. The reversal of 13991007 is 70019931.

It is not a de Polignac number, because 13991007 - 2⁶ = 13990943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13991009) 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, 8707 + ... + 10187.

It is an arithmetic number, because the mean of its divisors is an integer number (1209312).

Almost surely, 2^13991007 is an apocalyptic number.

13991007 is a deficient number, since it is larger than the sum of its proper divisors (5357985).

13991007 is a wasteful number, since it uses less digits than its factorization.

13991007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1598.

The product of its (nonzero) digits is 1701, while the sum is 30.

The square root of 13991007 is about 3740.4554535511. The cubic root of 13991007 is about 240.9626096272.

The spelling of 13991007 in words is "thirteen million, nine hundred ninety-one thousand, seven".