98656781 has 2 divisors, whose sum is σ = 98656782. Its totient is φ = 98656780.

The previous prime is 98656757. The next prime is 98656819. The reversal of 98656781 is 18765689.

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., 67798756 + 30858025 = 8234^2 + 5555^2 .

It is a cyclic number.

It is not a de Polignac number, because 98656781 - 2⁶ = 98656717 is a prime.

It is a super-2 number, since 2×98656781² = 19466320874563922, which contains 22 as substring.

It is a Chen prime.

It is equal to p_5688689 and since 98656781 and 5688689 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98656711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49328390 + 49328391.

It is an arithmetic number, because the mean of its divisors is an integer number (49328391).

Almost surely, 2^98656781 is an apocalyptic number.

It is an amenable number.

98656781 is a deficient number, since it is larger than the sum of its proper divisors (1).

98656781 is an equidigital number, since it uses as much as digits as its factorization.

98656781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 50.

The square root of 98656781 is about 9932.6119928244. The cubic root of 98656781 is about 462.0712848282.

The spelling of 98656781 in words is "ninety-eight million, six hundred fifty-six thousand, seven hundred eighty-one".