189190183931 has 4 divisors (see below), whose sum is σ = 216217353072. Its totient is φ = 162163014792.

The previous prime is 189190183921. The next prime is 189190183939. The reversal of 189190183931 is 139381091981.

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-189190183931 is a prime.

It is a super-2 number, since 2×189190183931² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (189190183939) 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, 13513584560 + ... + 13513584573.

It is an arithmetic number, because the mean of its divisors is an integer number (54054338268).

Almost surely, 2^189190183931 is an apocalyptic number.

189190183931 is a deficient number, since it is larger than the sum of its proper divisors (27027169141).

189190183931 is an equidigital number, since it uses as much as digits as its factorization.

189190183931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27027169140.

The product of its (nonzero) digits is 419904, while the sum is 53.

The spelling of 189190183931 in words is "one hundred eighty-nine billion, one hundred ninety million, one hundred eighty-three thousand, nine hundred thirty-one".