198983923 has 2 divisors, whose sum is σ = 198983924. Its totient is φ = 198983922.

The previous prime is 198983899. The next prime is 198983927. The reversal of 198983923 is 329389891.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198983923 is a prime.

It is a super-2 number, since 2×198983923² = 79189203224939858, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (198983927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99491961 + 99491962.

It is an arithmetic number, because the mean of its divisors is an integer number (99491962).

Almost surely, 2^198983923 is an apocalyptic number.

198983923 is a deficient number, since it is larger than the sum of its proper divisors (1).

198983923 is an equidigital number, since it uses as much as digits as its factorization.

198983923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 52.

The square root of 198983923 is about 14106.1661339997. The cubic root of 198983923 is about 583.8115233956.

The spelling of 198983923 in words is "one hundred ninety-eight million, nine hundred eighty-three thousand, nine hundred twenty-three".