13877997 has 32 divisors (see below), whose sum is σ = 22194432. Its totient is φ = 7547904.

The previous prime is 13877971. The next prime is 13878017. The reversal of 13877997 is 79977831.

It is a happy number.

It is not a de Polignac number, because 13877997 - 2⁸ = 13877741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13877917) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41013 + ... + 41349.

It is an arithmetic number, because the mean of its divisors is an integer number (693576).

Almost surely, 2^13877997 is an apocalyptic number.

It is an amenable number.

13877997 is a deficient number, since it is larger than the sum of its proper divisors (8316435).

13877997 is a wasteful number, since it uses less digits than its factorization.

13877997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437.

The product of its digits is 666792, while the sum is 51.

The square root of 13877997 is about 3725.3183756560. The cubic root of 13877997 is about 240.3120766636.

The spelling of 13877997 in words is "thirteen million, eight hundred seventy-seven thousand, nine hundred ninety-seven".