13172993 has 4 divisors (see below), whose sum is σ = 13212420. Its totient is φ = 13133568.

The previous prime is 13172983. The next prime is 13173001. The reversal of 13172993 is 39927131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39927131 = 73 ⋅546947.

It can be written as a sum of positive squares in 2 ways, for example, as 3888784 + 9284209 = 1972^2 + 3047^2 .

It is a cyclic number.

It is not a de Polignac number, because 13172993 - 2¹⁴ = 13156609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13172953) 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, 19208 + ... + 19881.

It is an arithmetic number, because the mean of its divisors is an integer number (3303105).

Almost surely, 2^13172993 is an apocalyptic number.

It is an amenable number.

13172993 is a deficient number, since it is larger than the sum of its proper divisors (39427).

13172993 is an equidigital number, since it uses as much as digits as its factorization.

13172993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39426.

The product of its digits is 10206, while the sum is 35.

The square root of 13172993 is about 3629.4618058329. The cubic root of 13172993 is about 236.1718620310.

The spelling of 13172993 in words is "thirteen million, one hundred seventy-two thousand, nine hundred ninety-three".