13217397 has 8 divisors (see below), whose sum is σ = 17687040. Its totient is φ = 8779680.

The previous prime is 13217363. The next prime is 13217423. The reversal of 13217397 is 79371231.

It is a happy number.

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

It is not a de Polignac number, because 13217397 - 2¹⁶ = 13151861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13217327) 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, 6997 + ... + 8682.

It is an arithmetic number, because the mean of its divisors is an integer number (2210880).

Almost surely, 2^13217397 is an apocalyptic number.

It is an amenable number.

13217397 is a deficient number, since it is larger than the sum of its proper divisors (4469643).

13217397 is a wasteful number, since it uses less digits than its factorization.

13217397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15963.

The product of its digits is 7938, while the sum is 33.

The square root of 13217397 is about 3635.5738199079. The cubic root of 13217397 is about 236.4369299643.

The spelling of 13217397 in words is "thirteen million, two hundred seventeen thousand, three hundred ninety-seven".