190809239 has 2 divisors, whose sum is σ = 190809240. Its totient is φ = 190809238.

The previous prime is 190809221. The next prime is 190809271. The reversal of 190809239 is 932908091.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190809239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 190809196 and 190809205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190809439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95404619 + 95404620.

It is an arithmetic number, because the mean of its divisors is an integer number (95404620).

Almost surely, 2^190809239 is an apocalyptic number.

190809239 is a deficient number, since it is larger than the sum of its proper divisors (1).

190809239 is an equidigital number, since it uses as much as digits as its factorization.

190809239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 190809239 is about 13813.3717462465. The cubic root of 190809239 is about 575.7047328861.

The spelling of 190809239 in words is "one hundred ninety million, eight hundred nine thousand, two hundred thirty-nine".