198152791 has 2 divisors, whose sum is σ = 198152792. Its totient is φ = 198152790.

The previous prime is 198152783. The next prime is 198152807. The reversal of 198152791 is 197251891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 198152791 - 2³ = 198152783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198152711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99076395 + 99076396.

It is an arithmetic number, because the mean of its divisors is an integer number (99076396).

Almost surely, 2^198152791 is an apocalyptic number.

198152791 is a deficient number, since it is larger than the sum of its proper divisors (1).

198152791 is an equidigital number, since it uses as much as digits as its factorization.

198152791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 43.

The square root of 198152791 is about 14076.6754242612. The cubic root of 198152791 is about 582.9975521317.

The spelling of 198152791 in words is "one hundred ninety-eight million, one hundred fifty-two thousand, seven hundred ninety-one".