13899831 has 8 divisors (see below), whose sum is σ = 20217984. Its totient is φ = 8424120.

The previous prime is 13899803. The next prime is 13899839.

It is a happy number.

13899831 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 13899831 - 2⁵ = 13899799 is a prime.

It is a super-2 number, since 2×13899831² = 386410603657122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13899839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210571 + ... + 210636.

It is an arithmetic number, because the mean of its divisors is an integer number (2527248).

Almost surely, 2^13899831 is an apocalyptic number.

13899831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13899831 is a deficient number, since it is larger than the sum of its proper divisors (6318153).

13899831 is a wasteful number, since it uses less digits than its factorization.

13899831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421221.

The product of its digits is 46656, while the sum is 42.

The square root of 13899831 is about 3728.2477117273. The cubic root of 13899831 is about 240.4380368347.

The spelling of 13899831 in words is "thirteen million, eight hundred ninety-nine thousand, eight hundred thirty-one".