12973732501 has 4 divisors (see below), whose sum is σ = 12973965004. Its totient is φ = 12973500000.

The previous prime is 12973732483. The next prime is 12973732511. The reversal of 12973732501 is 10523737921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11571304900 + 1402427601 = 107570^2 + 37449^2 .

It is a 3-Lehmer number, since φ(12973732501) divides (12973732501-1)³.

It is a cyclic number.

It is not a de Polignac number, because 12973732501 - 2²⁷ = 12839514773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12973732511) 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, 23251 + ... + 162751.

It is an arithmetic number, because the mean of its divisors is an integer number (3243491251).

It is a Poulet number, since it divides 2^12973732500-1.

Almost surely, 2^12973732501 is an apocalyptic number.

12973732501 is the 93001-st pentagonal number.

It is an amenable number.

12973732501 is a deficient number, since it is larger than the sum of its proper divisors (232503).

12973732501 is an equidigital number, since it uses as much as digits as its factorization.

12973732501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232502.

The product of its (nonzero) digits is 79380, while the sum is 40.

The spelling of 12973732501 in words is "twelve billion, nine hundred seventy-three million, seven hundred thirty-two thousand, five hundred one".