13197172439 has 4 divisors (see below), whose sum is σ = 14396915400. Its totient is φ = 11997429480.

The previous prime is 13197172427. The next prime is 13197172447. The reversal of 13197172439 is 93427179131.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 13197172439 - 2¹² = 13197168343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13197172393 and 13197172402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13197172489) 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, 599871464 + ... + 599871485.

It is an arithmetic number, because the mean of its divisors is an integer number (3599228850).

Almost surely, 2^13197172439 is an apocalyptic number.

13197172439 is a deficient number, since it is larger than the sum of its proper divisors (1199742961).

13197172439 is a wasteful number, since it uses less digits than its factorization.

13197172439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199742960.

The product of its digits is 285768, while the sum is 47.

The spelling of 13197172439 in words is "thirteen billion, one hundred ninety-seven million, one hundred seventy-two thousand, four hundred thirty-nine".