13993233849 has 81 divisors (see below), whose sum is σ = 24257115909. Its totient is φ = 7750557360.

The previous prime is 13993233827. The next prime is 13993233911. The reversal of 13993233849 is 94833239931.

The square root of 13993233849 is 118293.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 13993233849 - 2⁹ = 13993233337 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13993233795 and 13993233804.

It is not an unprimeable number, because it can be changed into a prime (13993233049) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 106818514 + ... + 106818644.

Almost surely, 2^13993233849 is an apocalyptic number.

13993233849 is the 118293-rd square number.

13993233849 is the 59147-th centered octagonal number.

It is an amenable number.

13993233849 is a deficient number, since it is larger than the sum of its proper divisors (10263882060).

13993233849 is an equidigital number, since it uses as much as digits as its factorization.

13993233849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368 (or 184 counting only the distinct ones).

The product of its digits is 3779136, while the sum is 54.

The spelling of 13993233849 in words is "thirteen billion, nine hundred ninety-three million, two hundred thirty-three thousand, eight hundred forty-nine".