98461439981 has 2 divisors, whose sum is σ = 98461439982. Its totient is φ = 98461439980.

The previous prime is 98461439971. The next prime is 98461440023. The reversal of 98461439981 is 18993416489.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52780927081 + 45680512900 = 229741^2 + 213730^2 .

It is an emirp because it is prime and its reverse (18993416489) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98461439981 - 2²⁶ = 98394331117 is a prime.

It is a super-2 number, since 2×98461439981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98461439941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49230719990 + 49230719991.

It is an arithmetic number, because the mean of its divisors is an integer number (49230719991).

Almost surely, 2^98461439981 is an apocalyptic number.

It is an amenable number.

98461439981 is a deficient number, since it is larger than the sum of its proper divisors (1).

98461439981 is an equidigital number, since it uses as much as digits as its factorization.

98461439981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13436928, while the sum is 62.

The spelling of 98461439981 in words is "ninety-eight billion, four hundred sixty-one million, four hundred thirty-nine thousand, nine hundred eighty-one".