98992781 has 2 divisors, whose sum is σ = 98992782. Its totient is φ = 98992780.

The previous prime is 98992741. The next prime is 98992799. The reversal of 98992781 is 18729989.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59428681 + 39564100 = 7709^2 + 6290^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98992781 is a prime.

It is a super-2 number, since 2×98992781² = 19599141380227922, 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 (98992741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49496390 + 49496391.

It is an arithmetic number, because the mean of its divisors is an integer number (49496391).

Almost surely, 2^98992781 is an apocalyptic number.

It is an amenable number.

98992781 is a deficient number, since it is larger than the sum of its proper divisors (1).

98992781 is an equidigital number, since it uses as much as digits as its factorization.

98992781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 53.

The square root of 98992781 is about 9949.5115960533. The cubic root of 98992781 is about 462.5952563475.

The spelling of 98992781 in words is "ninety-eight million, nine hundred ninety-two thousand, seven hundred eighty-one".