98109997 has 2 divisors, whose sum is σ = 98109998. Its totient is φ = 98109996.

The previous prime is 98109989. The next prime is 98110003. The reversal of 98109997 is 79990189.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97199881 + 910116 = 9859^2 + 954^2 .

It is a cyclic number.

It is not a de Polignac number, because 98109997 - 2³ = 98109989 is a prime.

It is a super-2 number, since 2×98109997² = 19251143022680018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98109967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49054998 + 49054999.

It is an arithmetic number, because the mean of its divisors is an integer number (49054999).

Almost surely, 2^98109997 is an apocalyptic number.

It is an amenable number.

98109997 is a deficient number, since it is larger than the sum of its proper divisors (1).

98109997 is an equidigital number, since it uses as much as digits as its factorization.

98109997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 367416, while the sum is 52.

The square root of 98109997 is about 9905.0490660067. The cubic root of 98109997 is about 461.2160593215.

The spelling of 98109997 in words is "ninety-eight million, one hundred nine thousand, nine hundred ninety-seven".