998929899 has 18 divisors (see below), whose sum is σ = 1585997868. Its totient is φ = 605411400.

The previous prime is 998929879. The next prime is 998929901.

998929899 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 998929899 - 2¹⁵ = 998897131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (998929829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 457557 + ... + 459734.

Almost surely, 2^998929899 is an apocalyptic number.

998929899 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

998929899 is a deficient number, since it is larger than the sum of its proper divisors (587067969).

998929899 is a wasteful number, since it uses less digits than its factorization.

998929899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917319 (or 917305 counting only the distinct ones).

The product of its digits is 68024448, while the sum is 72.

The square root of 998929899 is about 31605.8522903591. The cubic root of 998929899 is about 999.6431723558.

The spelling of 998929899 in words is "nine hundred ninety-eight million, nine hundred twenty-nine thousand, eight hundred ninety-nine".