98238781 has 2 divisors, whose sum is σ = 98238782. Its totient is φ = 98238780.

The previous prime is 98238769. The next prime is 98238809. The reversal of 98238781 is 18783289.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69455556 + 28783225 = 8334^2 + 5365^2 .

It is a cyclic number.

It is not a de Polignac number, because 98238781 - 2⁹ = 98238269 is a prime.

It is a super-2 number, since 2×98238781² = 19301716184731922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98232781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49119390 + 49119391.

It is an arithmetic number, because the mean of its divisors is an integer number (49119391).

Almost surely, 2^98238781 is an apocalyptic number.

It is an amenable number.

98238781 is a deficient number, since it is larger than the sum of its proper divisors (1).

98238781 is an equidigital number, since it uses as much as digits as its factorization.

98238781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 46.

The square root of 98238781 is about 9911.5478609549. The cubic root of 98238781 is about 461.4177760357.

The spelling of 98238781 in words is "ninety-eight million, two hundred thirty-eight thousand, seven hundred eighty-one".