98139637 has 2 divisors, whose sum is σ = 98139638. Its totient is φ = 98139636.

The previous prime is 98139599. The next prime is 98139641. The reversal of 98139637 is 73693189.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70408881 + 27730756 = 8391^2 + 5266^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98139637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98139647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49069818 + 49069819.

It is an arithmetic number, because the mean of its divisors is an integer number (49069819).

Almost surely, 2^98139637 is an apocalyptic number.

It is an amenable number.

98139637 is a deficient number, since it is larger than the sum of its proper divisors (1).

98139637 is an equidigital number, since it uses as much as digits as its factorization.

98139637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 46.

The square root of 98139637 is about 9906.5451596407. The cubic root of 98139637 is about 461.2625006221.

The spelling of 98139637 in words is "ninety-eight million, one hundred thirty-nine thousand, six hundred thirty-seven".