98735561 has 2 divisors, whose sum is σ = 98735562. Its totient is φ = 98735560.

The previous prime is 98735521. The next prime is 98735563. The reversal of 98735561 is 16553789.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51552400 + 47183161 = 7180^2 + 6869^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98735561 is a prime.

It is a super-3 number, since 3×98735561³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 98735563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (98735563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49367780 + 49367781.

It is an arithmetic number, because the mean of its divisors is an integer number (49367781).

Almost surely, 2^98735561 is an apocalyptic number.

It is an amenable number.

98735561 is a deficient number, since it is larger than the sum of its proper divisors (1).

98735561 is an equidigital number, since it uses as much as digits as its factorization.

98735561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 226800, while the sum is 44.

The square root of 98735561 is about 9936.5769256822. The cubic root of 98735561 is about 462.1942440763.

The spelling of 98735561 in words is "ninety-eight million, seven hundred thirty-five thousand, five hundred sixty-one".