98363981 has 2 divisors, whose sum is σ = 98363982. Its totient is φ = 98363980.

The previous prime is 98363977. The next prime is 98363987. The reversal of 98363981 is 18936389.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78605956 + 19758025 = 8866^2 + 4445^2 .

It is a cyclic number.

It is not a de Polignac number, because 98363981 - 2² = 98363977 is a prime.

It is a super-2 number, since 2×98363981² = 19350945516336722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98363987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49181990 + 49181991.

It is an arithmetic number, because the mean of its divisors is an integer number (49181991).

Almost surely, 2^98363981 is an apocalyptic number.

It is an amenable number.

98363981 is a deficient number, since it is larger than the sum of its proper divisors (1).

98363981 is an equidigital number, since it uses as much as digits as its factorization.

98363981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 47.

The square root of 98363981 is about 9917.8617151077. The cubic root of 98363981 is about 461.6137101362.

The spelling of 98363981 in words is "ninety-eight million, three hundred sixty-three thousand, nine hundred eighty-one".