98815799 has 4 divisors (see below), whose sum is σ = 99027864. Its totient is φ = 98603736.

The previous prime is 98815777. The next prime is 98815813. The reversal of 98815799 is 99751889.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99751889 = 37 ⋅2695997.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98815799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98815099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105332 + ... + 106265.

It is an arithmetic number, because the mean of its divisors is an integer number (24756966).

Almost surely, 2^98815799 is an apocalyptic number.

98815799 is a deficient number, since it is larger than the sum of its proper divisors (212065).

98815799 is a wasteful number, since it uses less digits than its factorization.

98815799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212064.

The product of its digits is 1632960, while the sum is 56.

The square root of 98815799 is about 9940.6136128511. The cubic root of 98815799 is about 462.3194117463.

The spelling of 98815799 in words is "ninety-eight million, eight hundred fifteen thousand, seven hundred ninety-nine".