992890191 has 8 divisors (see below), whose sum is σ = 1334278144. Its totient is φ = 656714520.

The previous prime is 992890187. The next prime is 992890193. The reversal of 992890191 is 191098299.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 992890191 - 2² = 992890187 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 992890191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (992890193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1302625 + ... + 1303386.

It is an arithmetic number, because the mean of its divisors is an integer number (166784768).

Almost surely, 2^992890191 is an apocalyptic number.

992890191 is a deficient number, since it is larger than the sum of its proper divisors (341387953).

992890191 is a wasteful number, since it uses less digits than its factorization.

992890191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2606141.

The product of its (nonzero) digits is 104976, while the sum is 48.

The square root of 992890191 is about 31510.1601233634. The cubic root of 992890191 is about 997.6244247778.

The spelling of 992890191 in words is "nine hundred ninety-two million, eight hundred ninety thousand, one hundred ninety-one".