13980831 has 4 divisors (see below), whose sum is σ = 18641112. Its totient is φ = 9320552.

The previous prime is 13980821. The next prime is 13980839. The reversal of 13980831 is 13808931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13808931 = 3 ⋅4602977.

It is a cyclic number.

It is not a de Polignac number, because 13980831 - 2¹⁰ = 13979807 is a prime.

It is a super-2 number, since 2×13980831² = 390927270901122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13980792 and 13980801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13980839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2330136 + ... + 2330141.

It is an arithmetic number, because the mean of its divisors is an integer number (4660278).

Almost surely, 2^13980831 is an apocalyptic number.

13980831 is a deficient number, since it is larger than the sum of its proper divisors (4660281).

13980831 is an equidigital number, since it uses as much as digits as its factorization.

13980831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4660280.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 13980831 is about 3739.0949439671. The cubic root of 13980831 is about 240.9041761341.

The spelling of 13980831 in words is "thirteen million, nine hundred eighty thousand, eight hundred thirty-one".