999707998 has 8 divisors (see below), whose sum is σ = 1499851008. Its totient is φ = 499757664.

The previous prime is 999707963. The next prime is 999708011. The reversal of 999707998 is 899707999.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 34411 + ... + 56422.

It is an arithmetic number, because the mean of its divisors is an integer number (187481376).

Almost surely, 2^999707998 is an apocalyptic number.

999707998 is a deficient number, since it is larger than the sum of its proper divisors (500143010).

999707998 is a wasteful number, since it uses less digits than its factorization.

999707998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96338.

The product of its (nonzero) digits is 23147208, while the sum is 67.

The square root of 999707998 is about 31618.1593075878. The cubic root of 999707998 is about 999.9026565246.

Subtracting from 999707998 its reverse (899707999), we obtain a palindrome (99999999).

The spelling of 999707998 in words is "nine hundred ninety-nine million, seven hundred seven thousand, nine hundred ninety-eight".