197999023 has 2 divisors, whose sum is σ = 197999024. Its totient is φ = 197999022.

The previous prime is 197998993. The next prime is 197999029. The reversal of 197999023 is 320999791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 197999023 - 2⁵ = 197998991 is a prime.

It is a super-2 number, since 2×197999023² = 78407226217909058, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197999029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98999511 + 98999512.

It is an arithmetic number, because the mean of its divisors is an integer number (98999512).

Almost surely, 2^197999023 is an apocalyptic number.

197999023 is a deficient number, since it is larger than the sum of its proper divisors (1).

197999023 is an equidigital number, since it uses as much as digits as its factorization.

197999023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 275562, while the sum is 49.

The square root of 197999023 is about 14071.2125632441. The cubic root of 197999023 is about 582.8467096667.

The spelling of 197999023 in words is "one hundred ninety-seven million, nine hundred ninety-nine thousand, twenty-three".