13697018 has 4 divisors (see below), whose sum is σ = 20545530. Its totient is φ = 6848508.

The previous prime is 13697003. The next prime is 13697023. The reversal of 13697018 is 81079631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81079631 = 19 ⋅4267349.

It can be written as a sum of positive squares in only one way, i.e., 8254129 + 5442889 = 2873^2 + 2333^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3424253 + ... + 3424256.

Almost surely, 2^13697018 is an apocalyptic number.

13697018 is a deficient number, since it is larger than the sum of its proper divisors (6848512).

13697018 is an equidigital number, since it uses as much as digits as its factorization.

13697018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6848511.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 13697018 is about 3700.9482568661. The cubic root of 13697018 is about 239.2628888941.

The spelling of 13697018 in words is "thirteen million, six hundred ninety-seven thousand, eighteen".