98987676521 has 2 divisors, whose sum is σ = 98987676522. Its totient is φ = 98987676520.

The previous prime is 98987676467. The next prime is 98987676587. The reversal of 98987676521 is 12567678989.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66183222121 + 32804454400 = 257261^2 + 181120^2 .

It is a cyclic number.

It is not a de Polignac number, because 98987676521 - 2²² = 98983482217 is a prime.

It is a super-2 number, since 2×98987676521² (a number of 23 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (98987676121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49493838260 + 49493838261.

It is an arithmetic number, because the mean of its divisors is an integer number (49493838261).

Almost surely, 2^98987676521 is an apocalyptic number.

It is an amenable number.

98987676521 is a deficient number, since it is larger than the sum of its proper divisors (1).

98987676521 is an equidigital number, since it uses as much as digits as its factorization.

98987676521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 91445760, while the sum is 68.

The spelling of 98987676521 in words is "ninety-eight billion, nine hundred eighty-seven million, six hundred seventy-six thousand, five hundred twenty-one".