190989983 has 4 divisors (see below), whose sum is σ = 191017728. Its totient is φ = 190962240.

The previous prime is 190989959. The next prime is 190989989. The reversal of 190989983 is 389989091.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 389989091 = 6779 ⋅57529.

It is a cyclic number.

It is not a de Polignac number, because 190989983 - 2²⁰ = 189941407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190989989) 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, 5135 + ... + 20207.

It is an arithmetic number, because the mean of its divisors is an integer number (47754432).

Almost surely, 2^190989983 is an apocalyptic number.

190989983 is a deficient number, since it is larger than the sum of its proper divisors (27745).

190989983 is a wasteful number, since it uses less digits than its factorization.

190989983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27744.

The product of its (nonzero) digits is 1259712, while the sum is 56.

The square root of 190989983 is about 13819.9125539925. The cubic root of 190989983 is about 575.8864542372.

The spelling of 190989983 in words is "one hundred ninety million, nine hundred eighty-nine thousand, nine hundred eighty-three".