190920843 has 6 divisors (see below), whose sum is σ = 275774564. Its totient is φ = 127280556.

The previous prime is 190920839. The next prime is 190920857. The reversal of 190920843 is 348029091.

It is not a de Polignac number, because 190920843 - 2² = 190920839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 190920798 and 190920807.

It is not an unprimeable number, because it can be changed into a prime (190920883) 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, 10606705 + ... + 10606722.

Almost surely, 2^190920843 is an apocalyptic number.

190920843 is a deficient number, since it is larger than the sum of its proper divisors (84853721).

190920843 is a wasteful number, since it uses less digits than its factorization.

190920843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21213433 (or 21213430 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 190920843 is about 13817.4108645578. The cubic root of 190920843 is about 575.8169539167.

The spelling of 190920843 in words is "one hundred ninety million, nine hundred twenty thousand, eight hundred forty-three".