98163581 has 2 divisors, whose sum is σ = 98163582. Its totient is φ = 98163580.

The previous prime is 98163511. The next prime is 98163601. The reversal of 98163581 is 18536189.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81631225 + 16532356 = 9035^2 + 4066^2 .

It is a cyclic number.

It is not a de Polignac number, because 98163581 - 2¹⁰ = 98162557 is a prime.

It is a super-2 number, since 2×98163581² = 19272177269487122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98163511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49081790 + 49081791.

It is an arithmetic number, because the mean of its divisors is an integer number (49081791).

Almost surely, 2^98163581 is an apocalyptic number.

It is an amenable number.

98163581 is a deficient number, since it is larger than the sum of its proper divisors (1).

98163581 is an equidigital number, since it uses as much as digits as its factorization.

98163581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 41.

The square root of 98163581 is about 9907.7535798989. The cubic root of 98163581 is about 461.3000103432.

The spelling of 98163581 in words is "ninety-eight million, one hundred sixty-three thousand, five hundred eighty-one".