198699023 has 2 divisors, whose sum is σ = 198699024. Its totient is φ = 198699022.

The previous prime is 198699013. The next prime is 198699031. The reversal of 198699023 is 320996891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198699023 - 2²² = 194504719 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198699013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99349511 + 99349512.

It is an arithmetic number, because the mean of its divisors is an integer number (99349512).

Almost surely, 2^198699023 is an apocalyptic number.

198699023 is a deficient number, since it is larger than the sum of its proper divisors (1).

198699023 is an equidigital number, since it uses as much as digits as its factorization.

198699023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 47.

The square root of 198699023 is about 14096.0640960518. The cubic root of 198699023 is about 583.5327615991.

The spelling of 198699023 in words is "one hundred ninety-eight million, six hundred ninety-nine thousand, twenty-three".