998767899 has 12 divisors (see below), whose sum is σ = 1481656176. Its totient is φ = 647849232.

The previous prime is 998767897. The next prime is 998767909.

998767899 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 998767899 - 2¹ = 998767897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (998767897) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1499319 + ... + 1499984.

It is an arithmetic number, because the mean of its divisors is an integer number (123471348).

Almost surely, 2^998767899 is an apocalyptic number.

998767899 is a deficient number, since it is larger than the sum of its proper divisors (482888277).

998767899 is a wasteful number, since it uses less digits than its factorization.

998767899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2999346 (or 2999343 counting only the distinct ones).

The product of its digits is 123451776, while the sum is 72.

The square root of 998767899 is about 31603.2893699374. The cubic root of 998767899 is about 999.5891308763.

The spelling of 998767899 in words is "nine hundred ninety-eight million, seven hundred sixty-seven thousand, eight hundred ninety-nine".