98310581 has 2 divisors, whose sum is σ = 98310582. Its totient is φ = 98310580.

The previous prime is 98310547. The next prime is 98310587. The reversal of 98310581 is 18501389.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92352100 + 5958481 = 9610^2 + 2441^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98310581 is a prime.

It is a super-2 number, since 2×98310581² = 19329940673115122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98310587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49155290 + 49155291.

It is an arithmetic number, because the mean of its divisors is an integer number (49155291).

Almost surely, 2^98310581 is an apocalyptic number.

It is an amenable number.

98310581 is a deficient number, since it is larger than the sum of its proper divisors (1).

98310581 is an equidigital number, since it uses as much as digits as its factorization.

98310581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 98310581 is about 9915.1692370831. The cubic root of 98310581 is about 461.5301611449.

The spelling of 98310581 in words is "ninety-eight million, three hundred ten thousand, five hundred eighty-one".