198730087 has 2 divisors, whose sum is σ = 198730088. Its totient is φ = 198730086.

The previous prime is 198730079. The next prime is 198730111. The reversal of 198730087 is 780037891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 198730087 - 2³ = 198730079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198730027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99365043 + 99365044.

It is an arithmetic number, because the mean of its divisors is an integer number (99365044).

Almost surely, 2^198730087 is an apocalyptic number.

198730087 is a deficient number, since it is larger than the sum of its proper divisors (1).

198730087 is an equidigital number, since it uses as much as digits as its factorization.

198730087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 43.

The square root of 198730087 is about 14097.1659208509. The cubic root of 198730087 is about 583.5631692594.

The spelling of 198730087 in words is "one hundred ninety-eight million, seven hundred thirty thousand, eighty-seven".