13692321 has 36 divisors (see below), whose sum is σ = 21558992. Its totient is φ = 8681904.

The previous prime is 13692311. The next prime is 13692347. The reversal of 13692321 is 12329631.

13692321 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13692321 - 2⁷ = 13692193 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (13692311) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 204330 + ... + 204396.

Almost surely, 2^13692321 is an apocalyptic number.

It is an amenable number.

13692321 is a deficient number, since it is larger than the sum of its proper divisors (7866671).

13692321 is an frugal number, since it uses more digits than its factorization.

13692321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 99 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 13692321 is about 3700.3136353558. The cubic root of 13692321 is about 239.2355363157.

The spelling of 13692321 in words is "thirteen million, six hundred ninety-two thousand, three hundred twenty-one".