198465997 has 2 divisors, whose sum is σ = 198465998. Its totient is φ = 198465996.

The previous prime is 198465991. The next prime is 198466033. The reversal of 198465997 is 799564891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185749641 + 12716356 = 13629^2 + 3566^2 .

It is a cyclic number.

It is not a de Polignac number, because 198465997 - 2¹⁵ = 198433229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198465991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99232998 + 99232999.

It is an arithmetic number, because the mean of its divisors is an integer number (99232999).

Almost surely, 2^198465997 is an apocalyptic number.

It is an amenable number.

198465997 is a deficient number, since it is larger than the sum of its proper divisors (1).

198465997 is an equidigital number, since it uses as much as digits as its factorization.

198465997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4898880, while the sum is 58.

The square root of 198465997 is about 14087.7960306075. The cubic root of 198465997 is about 583.3045580001.

The spelling of 198465997 in words is "one hundred ninety-eight million, four hundred sixty-five thousand, nine hundred ninety-seven".