98871557 has 2 divisors, whose sum is σ = 98871558. Its totient is φ = 98871556.

The previous prime is 98871523. The next prime is 98871569. The reversal of 98871557 is 75517889.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63457156 + 35414401 = 7966^2 + 5951^2 .

It is an emirp because it is prime and its reverse (75517889) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98871557 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 (98871517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49435778 + 49435779.

It is an arithmetic number, because the mean of its divisors is an integer number (49435779).

Almost surely, 2^98871557 is an apocalyptic number.

It is an amenable number.

98871557 is a deficient number, since it is larger than the sum of its proper divisors (1).

98871557 is an equidigital number, since it uses as much as digits as its factorization.

98871557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 705600, while the sum is 50.

The square root of 98871557 is about 9943.4177725770. The cubic root of 98871557 is about 462.4063518208.

The spelling of 98871557 in words is "ninety-eight million, eight hundred seventy-one thousand, five hundred fifty-seven".