190005239 has 4 divisors (see below), whose sum is σ = 190800480. Its totient is φ = 189210000.

The previous prime is 190005229. The next prime is 190005241. The reversal of 190005239 is 932500091.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 190005239 - 2⁴ = 190005223 is a prime.

It is a super-2 number, since 2×190005239² = 72203981694894242, 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 (190005229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 397262 + ... + 397739.

It is an arithmetic number, because the mean of its divisors is an integer number (47700120).

Almost surely, 2^190005239 is an apocalyptic number.

190005239 is a deficient number, since it is larger than the sum of its proper divisors (795241).

190005239 is an equidigital number, since it uses as much as digits as its factorization.

190005239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795240.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 190005239 is about 13784.2387892839. The cubic root of 190005239 is about 574.8949917883.

It can be divided in two parts, 1900052 and 39, that added together give a palindrome (1900091).

The spelling of 190005239 in words is "one hundred ninety million, five thousand, two hundred thirty-nine".