13987365 has 16 divisors (see below), whose sum is σ = 25577088. Its totient is φ = 6394176.

The previous prime is 13987357. The next prime is 13987373. The reversal of 13987365 is 56378931.

It is an interprime number because it is at equal distance from previous prime (13987357) and next prime (13987373).

It is not a de Polignac number, because 13987365 - 2³ = 13987357 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66502 + ... + 66711.

It is an arithmetic number, because the mean of its divisors is an integer number (1598568).

Almost surely, 2^13987365 is an apocalyptic number.

13987365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13987365 is a deficient number, since it is larger than the sum of its proper divisors (11589723).

13987365 is a wasteful number, since it uses less digits than its factorization.

13987365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133228.

The product of its digits is 136080, while the sum is 42.

The square root of 13987365 is about 3739.9685827557. The cubic root of 13987365 is about 240.9416994815.

The spelling of 13987365 in words is "thirteen million, nine hundred eighty-seven thousand, three hundred sixty-five".