13581897 has 8 divisors (see below), whose sum is σ = 20696256. Its totient is φ = 7761072.

The previous prime is 13581863. The next prime is 13581899. The reversal of 13581897 is 79818531.

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

It is not a de Polignac number, because 13581897 - 2⁸ = 13581641 is a prime.

It is a super-2 number, since 2×13581897² = 368935852237218, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13581899) 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, 323358 + ... + 323399.

It is an arithmetic number, because the mean of its divisors is an integer number (2587032).

Almost surely, 2^13581897 is an apocalyptic number.

It is an amenable number.

13581897 is a deficient number, since it is larger than the sum of its proper divisors (7114359).

13581897 is an equidigital number, since it uses as much as digits as its factorization.

13581897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646767.

The product of its digits is 60480, while the sum is 42.

The square root of 13581897 is about 3685.3625330488. The cubic root of 13581897 is about 238.5906814259.

The spelling of 13581897 in words is "thirteen million, five hundred eighty-one thousand, eight hundred ninety-seven".