198158027 has 2 divisors, whose sum is σ = 198158028. Its totient is φ = 198158026.

The previous prime is 198158017. The next prime is 198158029. The reversal of 198158027 is 720851891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198158027 - 2⁶ = 198157963 is a prime.

Together with 198158029, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (198158029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99079013 + 99079014.

It is an arithmetic number, because the mean of its divisors is an integer number (99079014).

Almost surely, 2^198158027 is an apocalyptic number.

198158027 is a deficient number, since it is larger than the sum of its proper divisors (1).

198158027 is an equidigital number, since it uses as much as digits as its factorization.

198158027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 41.

The square root of 198158027 is about 14076.8614044467. The cubic root of 198158027 is about 583.0026871394.

The spelling of 198158027 in words is "one hundred ninety-eight million, one hundred fifty-eight thousand, twenty-seven".