198492751 has 2 divisors, whose sum is σ = 198492752. Its totient is φ = 198492750.

The previous prime is 198492743. The next prime is 198492769. The reversal of 198492751 is 157294891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 198492751 - 2³ = 198492743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198492781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99246375 + 99246376.

It is an arithmetic number, because the mean of its divisors is an integer number (99246376).

Almost surely, 2^198492751 is an apocalyptic number.

198492751 is a deficient number, since it is larger than the sum of its proper divisors (1).

198492751 is an equidigital number, since it uses as much as digits as its factorization.

198492751 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 46.

The square root of 198492751 is about 14088.7455438730. The cubic root of 198492751 is about 583.3307674082.

The spelling of 198492751 in words is "one hundred ninety-eight million, four hundred ninety-two thousand, seven hundred fifty-one".