189792749689 has 4 divisors (see below), whose sum is σ = 190853044560. Its totient is φ = 188732454820.

The previous prime is 189792749687. The next prime is 189792749779. The reversal of 189792749689 is 986947297981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 189792749689 - 2¹ = 189792749687 is a prime.

It is a super-2 number, since 2×189792749689² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189792749687) 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, 530147167 + ... + 530147524.

It is an arithmetic number, because the mean of its divisors is an integer number (47713261140).

Almost surely, 2^189792749689 is an apocalyptic number.

It is an amenable number.

189792749689 is a deficient number, since it is larger than the sum of its proper divisors (1060294871).

189792749689 is a wasteful number, since it uses less digits than its factorization.

189792749689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060294870.

The product of its digits is 987614208, while the sum is 79.

The spelling of 189792749689 in words is "one hundred eighty-nine billion, seven hundred ninety-two million, seven hundred forty-nine thousand, six hundred eighty-nine".