13618887 has 8 divisors (see below), whose sum is σ = 19226736. Its totient is φ = 8545152.

The previous prime is 13618879. The next prime is 13618903. The reversal of 13618887 is 78881631.

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

It is not a de Polignac number, because 13618887 - 2³ = 13618879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13618817) 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, 133468 + ... + 133569.

It is an arithmetic number, because the mean of its divisors is an integer number (2403342).

Almost surely, 2^13618887 is an apocalyptic number.

13618887 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

13618887 is a deficient number, since it is larger than the sum of its proper divisors (5607849).

13618887 is a wasteful number, since it uses less digits than its factorization.

13618887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267057.

The product of its digits is 64512, while the sum is 42.

The square root of 13618887 is about 3690.3776229541. The cubic root of 13618887 is about 238.8070839263.

The spelling of 13618887 in words is "thirteen million, six hundred eighteen thousand, eight hundred eighty-seven".