190909231 has 8 divisors (see below), whose sum is σ = 192645104. Its totient is φ = 189181440.

The previous prime is 190909219. The next prime is 190909241. The reversal of 190909231 is 132909091.

190909231 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 a cyclic number.

It is not a de Polignac number, because 190909231 - 2²¹ = 188812079 is a prime.

It is a super-2 number, since 2×190909231² = 72892668962022722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190909211) 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, 51676 + ... + 55246.

It is an arithmetic number, because the mean of its divisors is an integer number (24080638).

Almost surely, 2^190909231 is an apocalyptic number.

190909231 is a deficient number, since it is larger than the sum of its proper divisors (1735873).

190909231 is a wasteful number, since it uses less digits than its factorization.

190909231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4041.

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 190909231 is about 13816.9906636720. The cubic root of 190909231 is about 575.8052797556.

The spelling of 190909231 in words is "one hundred ninety million, nine hundred nine thousand, two hundred thirty-one".