190992021 has 8 divisors (see below), whose sum is σ = 277806624. Its totient is φ = 115752720.

The previous prime is 190992001. The next prime is 190992049. The reversal of 190992021 is 120299091.

190992021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 190992021 - 2⁵ = 190991989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 5787637 = 190992021 / (1 + 9 + 0 + 9 + 9 + 2 + 0 + 2 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190992001) 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, 2893786 + ... + 2893851.

It is an arithmetic number, because the mean of its divisors is an integer number (34725828).

Almost surely, 2^190992021 is an apocalyptic number.

190992021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

190992021 is a deficient number, since it is larger than the sum of its proper divisors (86814603).

190992021 is a wasteful number, since it uses less digits than its factorization.

190992021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5787651.

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 190992021 is about 13819.9862879816. The cubic root of 190992021 is about 575.8885026036. Note that the first 3 decimals are identical.

The spelling of 190992021 in words is "one hundred ninety million, nine hundred ninety-two thousand, twenty-one".