12993531 has 8 divisors (see below), whose sum is σ = 17478480. Its totient is φ = 8585472.

The previous prime is 12993509. The next prime is 12993571. The reversal of 12993531 is 13539921.

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

It is not a de Polignac number, because 12993531 - 2⁵ = 12993499 is a prime.

It is a super-2 number, since 2×12993531² = 337663695695922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 12993492 and 12993501.

It is not an unprimeable number, because it can be changed into a prime (12993571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18826 + ... + 19503.

It is an arithmetic number, because the mean of its divisors is an integer number (2184810).

Almost surely, 2^12993531 is an apocalyptic number.

12993531 is a deficient number, since it is larger than the sum of its proper divisors (4484949).

12993531 is a wasteful number, since it uses less digits than its factorization.

12993531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38445.

The product of its digits is 7290, while the sum is 33.

The square root of 12993531 is about 3604.6540749426. The cubic root of 12993531 is about 235.0944602905.

The spelling of 12993531 in words is "twelve million, nine hundred ninety-three thousand, five hundred thirty-one".