98775815 has 4 divisors (see below), whose sum is σ = 118530984. Its totient is φ = 79020648.

The previous prime is 98775791. The next prime is 98775821. The reversal of 98775815 is 51857789.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 98775815 - 2⁶ = 98775751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9877577 + ... + 9877586.

It is an arithmetic number, because the mean of its divisors is an integer number (29632746).

Almost surely, 2^98775815 is an apocalyptic number.

98775815 is a deficient number, since it is larger than the sum of its proper divisors (19755169).

98775815 is a wasteful number, since it uses less digits than its factorization.

98775815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19755168.

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

The square root of 98775815 is about 9938.6022659124. The cubic root of 98775815 is about 462.2570469782.

The spelling of 98775815 in words is "ninety-eight million, seven hundred seventy-five thousand, eight hundred fifteen".