198158419 has 2 divisors, whose sum is σ = 198158420. Its totient is φ = 198158418.

The previous prime is 198158393. The next prime is 198158437. The reversal of 198158419 is 914851891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198158419 - 2⁷ = 198158291 is a prime.

It is a super-2 number, since 2×198158419² = 78533518041159122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (198158459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99079209 + 99079210.

It is an arithmetic number, because the mean of its divisors is an integer number (99079210).

Almost surely, 2^198158419 is an apocalyptic number.

198158419 is a deficient number, since it is larger than the sum of its proper divisors (1).

198158419 is an equidigital number, since it uses as much as digits as its factorization.

198158419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 46.

The square root of 198158419 is about 14076.8753279980. The cubic root of 198158419 is about 583.0030715748.

The spelling of 198158419 in words is "one hundred ninety-eight million, one hundred fifty-eight thousand, four hundred nineteen".