98785781 has 2 divisors, whose sum is σ = 98785782. Its totient is φ = 98785780.

The previous prime is 98785741. The next prime is 98785801. The reversal of 98785781 is 18758789.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87123556 + 11662225 = 9334^2 + 3415^2 .

It is a cyclic number.

It is not a de Polignac number, because 98785781 - 2¹⁴ = 98769397 is a prime.

It is a super-2 number, since 2×98785781² = 19517261055559922, 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 (98785741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49392890 + 49392891.

It is an arithmetic number, because the mean of its divisors is an integer number (49392891).

Almost surely, 2^98785781 is an apocalyptic number.

It is an amenable number.

98785781 is a deficient number, since it is larger than the sum of its proper divisors (1).

98785781 is an equidigital number, since it uses as much as digits as its factorization.

98785781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1128960, while the sum is 53.

The square root of 98785781 is about 9939.1036316159. The cubic root of 98785781 is about 462.2725929523.

It can be divided in two parts, 987 and 85781, that added together give a palindrome (86768).

The spelling of 98785781 in words is "ninety-eight million, seven hundred eighty-five thousand, seven hundred eighty-one".