192172474639 has 4 divisors (see below), whose sum is σ = 192938102280. Its totient is φ = 191406847000.

The previous prime is 192172474619. The next prime is 192172474651. The reversal of 192172474639 is 936474271291.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-192172474639 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 192172474639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (192172474619) 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, 382813444 + ... + 382813945.

It is an arithmetic number, because the mean of its divisors is an integer number (48234525570).

Almost surely, 2^192172474639 is an apocalyptic number.

192172474639 is a deficient number, since it is larger than the sum of its proper divisors (765627641).

192172474639 is an equidigital number, since it uses as much as digits as its factorization.

192172474639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765627640.

The product of its digits is 4572288, while the sum is 55.

The spelling of 192172474639 in words is "one hundred ninety-two billion, one hundred seventy-two million, four hundred seventy-four thousand, six hundred thirty-nine".