199642983 has 16 divisors (see below), whose sum is σ = 272448000. Its totient is φ = 130001760.

The previous prime is 199642979. The next prime is 199642987. The reversal of 199642983 is 389246991.

It is an interprime number because it is at equal distance from previous prime (199642979) and next prime (199642987).

It is not a de Polignac number, because 199642983 - 2² = 199642979 is a prime.

It is a super-2 number, since 2×199642983² = 79714641322276578, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199642987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18918 + ... + 27516.

It is an arithmetic number, because the mean of its divisors is an integer number (17028000).

Almost surely, 2^199642983 is an apocalyptic number.

199642983 is a deficient number, since it is larger than the sum of its proper divisors (72805017).

199642983 is a wasteful number, since it uses less digits than its factorization.

199642983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8782.

The product of its digits is 839808, while the sum is 51.

The square root of 199642983 is about 14129.5075285730. The cubic root of 199642983 is about 584.4553657019.

The spelling of 199642983 in words is "one hundred ninety-nine million, six hundred forty-two thousand, nine hundred eighty-three".