13895987 has 12 divisors (see below), whose sum is σ = 16872720. Its totient is φ = 11208576.

The previous prime is 13895977. The next prime is 13895989. The reversal of 13895987 is 78959831.

It is not a de Polignac number, because 13895987 - 2¹⁰ = 13894963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13895989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1412 + ... + 5457.

It is an arithmetic number, because the mean of its divisors is an integer number (1406060).

Almost surely, 2^13895987 is an apocalyptic number.

13895987 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

13895987 is a deficient number, since it is larger than the sum of its proper divisors (2976733).

13895987 is an equidigital number, since it uses as much as digits as its factorization.

13895987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6910 (or 6893 counting only the distinct ones).

The product of its digits is 544320, while the sum is 50.

The square root of 13895987 is about 3727.7321523951. The cubic root of 13895987 is about 240.4158704015.

The spelling of 13895987 in words is "thirteen million, eight hundred ninety-five thousand, nine hundred eighty-seven".