98912981 has 2 divisors, whose sum is σ = 98912982. Its totient is φ = 98912980.

The previous prime is 98912963. The next prime is 98913019. The reversal of 98912981 is 18921989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97337956 + 1575025 = 9866^2 + 1255^2 .

It is an emirp because it is prime and its reverse (18921989) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98912981 - 2²⁶ = 31804117 is a prime.

It is a super-2 number, since 2×98912981² = 19567555620612722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98912921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49456490 + 49456491.

It is an arithmetic number, because the mean of its divisors is an integer number (49456491).

Almost surely, 2^98912981 is an apocalyptic number.

It is an amenable number.

98912981 is a deficient number, since it is larger than the sum of its proper divisors (1).

98912981 is an equidigital number, since it uses as much as digits as its factorization.

98912981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 47.

The square root of 98912981 is about 9945.5005404454. The cubic root of 98912981 is about 462.4709205968.

The spelling of 98912981 in words is "ninety-eight million, nine hundred twelve thousand, nine hundred eighty-one".