12993473531 has 2 divisors, whose sum is σ = 12993473532. Its totient is φ = 12993473530.

The previous prime is 12993473527. The next prime is 12993473533. The reversal of 12993473531 is 13537439921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12993473531 - 2² = 12993473527 is a prime.

It is a super-2 number, since 2×12993473531² (a number of 21 digits) contains 22 as substring.

Together with 12993473533, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12993473533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6496736765 + 6496736766.

It is an arithmetic number, because the mean of its divisors is an integer number (6496736766).

Almost surely, 2^12993473531 is an apocalyptic number.

12993473531 is a deficient number, since it is larger than the sum of its proper divisors (1).

12993473531 is an equidigital number, since it uses as much as digits as its factorization.

12993473531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 612360, while the sum is 47.

The spelling of 12993473531 in words is "twelve billion, nine hundred ninety-three million, four hundred seventy-three thousand, five hundred thirty-one".