13900691 has 16 divisors (see below), whose sum is σ = 16333056. Its totient is φ = 11585376.

The previous prime is 13900687. The next prime is 13900697. The reversal of 13900691 is 19600931.

13900691 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 13900691 - 2² = 13900687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13900697) 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, 50045 + ... + 50321.

It is an arithmetic number, because the mean of its divisors is an integer number (1020816).

Almost surely, 2^13900691 is an apocalyptic number.

13900691 is a deficient number, since it is larger than the sum of its proper divisors (2432365).

13900691 is a wasteful number, since it uses less digits than its factorization.

13900691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 13900691 is about 3728.3630456274. The cubic root of 13900691 is about 240.4429954669.

The spelling of 13900691 in words is "thirteen million, nine hundred thousand, six hundred ninety-one".