98138731 has 2 divisors, whose sum is σ = 98138732. Its totient is φ = 98138730.

The previous prime is 98138699. The next prime is 98138749. The reversal of 98138731 is 13783189.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 98138731 - 2⁵ = 98138699 is a prime.

It is a super-2 number, since 2×98138731² = 19262421044580722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (98138231) 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, 49069365 + 49069366.

It is an arithmetic number, because the mean of its divisors is an integer number (49069366).

Almost surely, 2^98138731 is an apocalyptic number.

98138731 is a deficient number, since it is larger than the sum of its proper divisors (1).

98138731 is an equidigital number, since it uses as much as digits as its factorization.

98138731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 40.

The square root of 98138731 is about 9906.4994321910. The cubic root of 98138731 is about 461.2610811986.

The spelling of 98138731 in words is "ninety-eight million, one hundred thirty-eight thousand, seven hundred thirty-one".