13570397 has 4 divisors (see below), whose sum is σ = 13710396. Its totient is φ = 13430400.

The previous prime is 13570393. The next prime is 13570399. The reversal of 13570397 is 79307531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79307531 = 131 ⋅605401.

It can be written as a sum of positive squares in 2 ways, for example, as 11195716 + 2374681 = 3346^2 + 1541^2 .

It is a cyclic number.

It is not a de Polignac number, because 13570397 - 2² = 13570393 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13570393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69854 + ... + 70047.

It is an arithmetic number, because the mean of its divisors is an integer number (3427599).

Almost surely, 2^13570397 is an apocalyptic number.

It is an amenable number.

13570397 is a deficient number, since it is larger than the sum of its proper divisors (139999).

13570397 is an equidigital number, since it uses as much as digits as its factorization.

13570397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139998.

The product of its (nonzero) digits is 19845, while the sum is 35.

The square root of 13570397 is about 3683.8019762197. The cubic root of 13570397 is about 238.5233229510.

The spelling of 13570397 in words is "thirteen million, five hundred seventy thousand, three hundred ninety-seven".