13689951 has 16 divisors (see below), whose sum is σ = 19987968. Its totient is φ = 8265600.

The previous prime is 13689931. The next prime is 13689959. The reversal of 13689951 is 15998631.

It is not a de Polignac number, because 13689951 - 2⁶ = 13689887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13689959) by changing a digit.

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, 10506 + ... + 11736.

It is an arithmetic number, because the mean of its divisors is an integer number (1249248).

Almost surely, 2^13689951 is an apocalyptic number.

13689951 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13689951 is a deficient number, since it is larger than the sum of its proper divisors (6298017).

13689951 is a wasteful number, since it uses less digits than its factorization.

13689951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1582.

The product of its digits is 58320, while the sum is 42.

The square root of 13689951 is about 3699.9933783725. The cubic root of 13689951 is about 239.2217324486.

The spelling of 13689951 in words is "thirteen million, six hundred eighty-nine thousand, nine hundred fifty-one".