189790931 has 4 divisors (see below), whose sum is σ = 207044664. Its totient is φ = 172537200.

The previous prime is 189790921. The next prime is 189790969. The reversal of 189790931 is 139097981.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 139097981 = 11 ⋅12645271.

It is not a de Polignac number, because 189790931 - 2¹⁰ = 189789907 is a prime.

It is a super-2 number, since 2×189790931² = 72041194979693522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189790921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8626850 + ... + 8626871.

It is an arithmetic number, because the mean of its divisors is an integer number (51761166).

Almost surely, 2^189790931 is an apocalyptic number.

189790931 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

189790931 is a deficient number, since it is larger than the sum of its proper divisors (17253733).

189790931 is a wasteful number, since it uses less digits than its factorization.

189790931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17253732.

The product of its (nonzero) digits is 122472, while the sum is 47.

The square root of 189790931 is about 13776.4629350207. The cubic root of 189790931 is about 574.6787680206.

The spelling of 189790931 in words is "one hundred eighty-nine million, seven hundred ninety thousand, nine hundred thirty-one".