190908839 has 6 divisors (see below), whose sum is σ = 209842080. Its totient is φ = 173553380.

The previous prime is 190908829. The next prime is 190908869. The reversal of 190908839 is 938809091.

It is not a de Polignac number, because 190908839 - 2¹² = 190904743 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 190908793 and 190908802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190908829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 788759 + ... + 789000.

It is an arithmetic number, because the mean of its divisors is an integer number (34973680).

Almost surely, 2^190908839 is an apocalyptic number.

190908839 is a deficient number, since it is larger than the sum of its proper divisors (18933241).

190908839 is a wasteful number, since it uses less digits than its factorization.

190908839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1577781 (or 1577770 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 190908839 is about 13816.9764782314. The cubic root of 190908839 is about 575.8048856489.

The spelling of 190908839 in words is "one hundred ninety million, nine hundred eight thousand, eight hundred thirty-nine".