13553397 has 24 divisors (see below), whose sum is σ = 23001888. Its totient is φ = 7581600.

The previous prime is 13553389. The next prime is 13553401. The reversal of 13553397 is 79335531.

It is a happy number.

13553397 is a `hidden beast` number, since 1 + 35 + 533 + 97 = 666.

It is not a de Polignac number, because 13553397 - 2³ = 13553389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13553347) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3979 + ... + 6552.

It is an arithmetic number, because the mean of its divisors is an integer number (958412).

Almost surely, 2^13553397 is an apocalyptic number.

It is an amenable number.

13553397 is a deficient number, since it is larger than the sum of its proper divisors (9448491).

13553397 is a wasteful number, since it uses less digits than its factorization.

13553397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10561 (or 10558 counting only the distinct ones).

The product of its digits is 42525, while the sum is 36.

The square root of 13553397 is about 3681.4938544020. The cubic root of 13553397 is about 238.4236798112.

The spelling of 13553397 in words is "thirteen million, five hundred fifty-three thousand, three hundred ninety-seven".