17879797893239 has 4 divisors (see below), whose sum is σ = 18820839887640. Its totient is φ = 16938755898840.

The previous prime is 17879797893161. The next prime is 17879797893299. The reversal of 17879797893239 is 93239879797871.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-17879797893239 is a prime.

It is a super-2 number, since 2×17879797893239² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17879797893299) 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, 470520997172 + ... + 470520997209.

It is an arithmetic number, because the mean of its divisors is an integer number (4705209971910).

Almost surely, 2^{17879797893239} is an apocalyptic number.

17879797893239 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

17879797893239 is a deficient number, since it is larger than the sum of its proper divisors (941041994401).

17879797893239 is an equidigital number, since it uses as much as digits as its factorization.

17879797893239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941041994400.

The product of its digits is 18147411072, while the sum is 89.

The spelling of 17879797893239 in words is "seventeen trillion, eight hundred seventy-nine billion, seven hundred ninety-seven million, eight hundred ninety-three thousand, two hundred thirty-nine".