198343423 has 2 divisors, whose sum is σ = 198343424. Its totient is φ = 198343422.

The previous prime is 198343381. The next prime is 198343447. The reversal of 198343423 is 324343891.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198343423 is a prime.

It is a super-2 number, since 2×198343423² = 78680226894713858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198323423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99171711 + 99171712.

It is an arithmetic number, because the mean of its divisors is an integer number (99171712).

Almost surely, 2^198343423 is an apocalyptic number.

198343423 is a deficient number, since it is larger than the sum of its proper divisors (1).

198343423 is an equidigital number, since it uses as much as digits as its factorization.

198343423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 37.

The square root of 198343423 is about 14083.4449975849. Note that the first 3 decimals coincide. The cubic root of 198343423 is about 583.1844489331.

The spelling of 198343423 in words is "one hundred ninety-eight million, three hundred forty-three thousand, four hundred twenty-three".