198695423 has 2 divisors, whose sum is σ = 198695424. Its totient is φ = 198695422.

The previous prime is 198695363. The next prime is 198695467. The reversal of 198695423 is 324596891.

It is a strong prime.

It is an emirp because it is prime and its reverse (324596891) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198695423 is a prime.

It is a super-2 number, since 2×198695423² = 78959742242297858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198695023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99347711 + 99347712.

It is an arithmetic number, because the mean of its divisors is an integer number (99347712).

Almost surely, 2^198695423 is an apocalyptic number.

198695423 is a deficient number, since it is larger than the sum of its proper divisors (1).

198695423 is an equidigital number, since it uses as much as digits as its factorization.

198695423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 47.

The square root of 198695423 is about 14095.9364002538. The cubic root of 198695423 is about 583.5292374573.

The spelling of 198695423 in words is "one hundred ninety-eight million, six hundred ninety-five thousand, four hundred twenty-three".