98755781 has 2 divisors, whose sum is σ = 98755782. Its totient is φ = 98755780.

The previous prime is 98755777. The next prime is 98755799. The reversal of 98755781 is 18755789.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89605156 + 9150625 = 9466^2 + 3025^2 .

It is a cyclic number.

It is not a de Polignac number, because 98755781 - 2² = 98755777 is a prime.

It is a super-2 number, since 2×98755781² = 19505408561839922, 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 (98755751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49377890 + 49377891.

It is an arithmetic number, because the mean of its divisors is an integer number (49377891).

Almost surely, 2^98755781 is an apocalyptic number.

It is an amenable number.

98755781 is a deficient number, since it is larger than the sum of its proper divisors (1).

98755781 is an equidigital number, since it uses as much as digits as its factorization.

98755781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 705600, while the sum is 50.

The square root of 98755781 is about 9937.5943265964. The cubic root of 98755781 is about 462.2257927558.

The spelling of 98755781 in words is "ninety-eight million, seven hundred fifty-five thousand, seven hundred eighty-one".