13672131997 has 4 divisors (see below), whose sum is σ = 14041649116. Its totient is φ = 13302614880.

The previous prime is 13672131973. The next prime is 13672132049. The reversal of 13672131997 is 79913127631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79913127631 = 6827 ⋅11705453.

It can be written as a sum of positive squares in 2 ways, for example, as 5835279321 + 7836852676 = 76389^2 + 88526^2 .

It is a cyclic number.

It is not a de Polignac number, because 13672131997 - 2³¹ = 11524648349 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13672131997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13672131917) 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, 184758504 + ... + 184758577.

It is an arithmetic number, because the mean of its divisors is an integer number (3510412279).

Almost surely, 2^13672131997 is an apocalyptic number.

It is an amenable number.

13672131997 is a deficient number, since it is larger than the sum of its proper divisors (369517119).

13672131997 is an equidigital number, since it uses as much as digits as its factorization.

13672131997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369517118.

The product of its digits is 428652, while the sum is 49.

The spelling of 13672131997 in words is "thirteen billion, six hundred seventy-two million, one hundred thirty-one thousand, nine hundred ninety-seven".