98138749 has 2 divisors, whose sum is σ = 98138750. Its totient is φ = 98138748.

The previous prime is 98138731. The next prime is 98138759. The reversal of 98138749 is 94783189.

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., 88172100 + 9966649 = 9390^2 + 3157^2 .

It is an emirp because it is prime and its reverse (94783189) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98138749 - 2²¹ = 96041597 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98138759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49069374 + 49069375.

It is an arithmetic number, because the mean of its divisors is an integer number (49069375).

Almost surely, 2^98138749 is an apocalyptic number.

It is an amenable number.

98138749 is a deficient number, since it is larger than the sum of its proper divisors (1).

98138749 is an equidigital number, since it uses as much as digits as its factorization.

98138749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 49.

The square root of 98138749 is about 9906.5003406854. The cubic root of 98138749 is about 461.2611093992.

The spelling of 98138749 in words is "ninety-eight million, one hundred thirty-eight thousand, seven hundred forty-nine".