98697089581 has 2 divisors, whose sum is σ = 98697089582. Its totient is φ = 98697089580.

The previous prime is 98697089551. The next prime is 98697089609. The reversal of 98697089581 is 18598079689.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97812562500 + 884527081 = 312750^2 + 29741^2 .

It is a cyclic number.

It is not a de Polignac number, because 98697089581 - 2⁹ = 98697089069 is a prime.

It is a super-2 number, since 2×98697089581² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 98697089581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98697089551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49348544790 + 49348544791.

It is an arithmetic number, because the mean of its divisors is an integer number (49348544791).

Almost surely, 2^98697089581 is an apocalyptic number.

It is an amenable number.

98697089581 is a deficient number, since it is larger than the sum of its proper divisors (1).

98697089581 is an equidigital number, since it uses as much as digits as its factorization.

98697089581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78382080, while the sum is 70.

The spelling of 98697089581 in words is "ninety-eight billion, six hundred ninety-seven million, eighty-nine thousand, five hundred eighty-one".