198678023 has 2 divisors, whose sum is σ = 198678024. Its totient is φ = 198678022.

The previous prime is 198677987. The next prime is 198678083. The reversal of 198678023 is 320876891.

It is a weak prime.

It is an emirp because it is prime and its reverse (320876891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198678023 - 2⁸ = 198677767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198678083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99339011 + 99339012.

It is an arithmetic number, because the mean of its divisors is an integer number (99339012).

Almost surely, 2^198678023 is an apocalyptic number.

198678023 is a deficient number, since it is larger than the sum of its proper divisors (1).

198678023 is an equidigital number, since it uses as much as digits as its factorization.

198678023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 198678023 is about 14095.3191875885. The cubic root of 198678023 is about 583.5122035049.

The spelling of 198678023 in words is "one hundred ninety-eight million, six hundred seventy-eight thousand, twenty-three".