98939857 has 2 divisors, whose sum is σ = 98939858. Its totient is φ = 98939856.

The previous prime is 98939839. The next prime is 98939927. The reversal of 98939857 is 75893989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95238081 + 3701776 = 9759^2 + 1924^2 .

It is an emirp because it is prime and its reverse (75893989) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98939857 is a prime.

It is not a weakly prime, because it can be changed into another prime (98939557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49469928 + 49469929.

It is an arithmetic number, because the mean of its divisors is an integer number (49469929).

Almost surely, 2^98939857 is an apocalyptic number.

It is an amenable number.

98939857 is a deficient number, since it is larger than the sum of its proper divisors (1).

98939857 is an equidigital number, since it uses as much as digits as its factorization.

98939857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4898880, while the sum is 58.

The square root of 98939857 is about 9946.8516124450. The cubic root of 98939857 is about 462.5128033466.

The spelling of 98939857 in words is "ninety-eight million, nine hundred thirty-nine thousand, eight hundred fifty-seven".