998839707 has 8 divisors (see below), whose sum is σ = 1333756176. Its totient is φ = 664908192.

The previous prime is 998839697. The next prime is 998839729. The reversal of 998839707 is 707938899.

It is a happy number.

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

It is not a de Polignac number, because 998839707 - 2¹⁸ = 998577563 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (998839207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243868 + ... + 247929.

It is an arithmetic number, because the mean of its divisors is an integer number (166719522).

Almost surely, 2^998839707 is an apocalyptic number.

998839707 is a deficient number, since it is larger than the sum of its proper divisors (334916469).

998839707 is a wasteful number, since it uses less digits than its factorization.

998839707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492477.

The product of its (nonzero) digits is 6858432, while the sum is 60.

The square root of 998839707 is about 31604.4254337901. The cubic root of 998839707 is about 999.6130859835.

The spelling of 998839707 in words is "nine hundred ninety-eight million, eight hundred thirty-nine thousand, seven hundred seven".