13623691 has 8 divisors (see below), whose sum is σ = 13811040. Its totient is φ = 13437888.

The previous prime is 13623667. The next prime is 13623697. The reversal of 13623691 is 19632631.

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

It is a cyclic number.

It is not a de Polignac number, because 13623691 - 2⁷ = 13623563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13623697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37770 + ... + 38128.

It is an arithmetic number, because the mean of its divisors is an integer number (1726380).

Almost surely, 2^13623691 is an apocalyptic number.

13623691 is a deficient number, since it is larger than the sum of its proper divisors (187349).

13623691 is a wasteful number, since it uses less digits than its factorization.

13623691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773.

The product of its digits is 5832, while the sum is 31.

The square root of 13623691 is about 3691.0284474656. The cubic root of 13623691 is about 238.8351599936.

The spelling of 13623691 in words is "thirteen million, six hundred twenty-three thousand, six hundred ninety-one".