98515889 has 2 divisors, whose sum is σ = 98515890. Its totient is φ = 98515888.

The previous prime is 98515883. The next prime is 98515891. The reversal of 98515889 is 98851589.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97851664 + 664225 = 9892^2 + 815^2 .

It is a cyclic number.

It is not a de Polignac number, because 98515889 - 2⁸ = 98515633 is a prime.

Together with 98515891, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 98515889.

It is not a weakly prime, because it can be changed into another prime (98515883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49257944 + 49257945.

It is an arithmetic number, because the mean of its divisors is an integer number (49257945).

Almost surely, 2^98515889 is an apocalyptic number.

It is an amenable number.

98515889 is a deficient number, since it is larger than the sum of its proper divisors (1).

98515889 is an equidigital number, since it uses as much as digits as its factorization.

98515889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1036800, while the sum is 53.

The square root of 98515889 is about 9925.5170646168. The cubic root of 98515889 is about 461.8512183099.

The spelling of 98515889 in words is "ninety-eight million, five hundred fifteen thousand, eight hundred eighty-nine".