998040899 has 4 divisors (see below), whose sum is σ = 998104680. Its totient is φ = 997977120.

The previous prime is 998040881. The next prime is 998040937.

998040899 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 998040899 - 2¹² = 998036803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998040839) 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, 9419 + ... + 45659.

It is an arithmetic number, because the mean of its divisors is an integer number (249526170).

Almost surely, 2^998040899 is an apocalyptic number.

998040899 is a deficient number, since it is larger than the sum of its proper divisors (63781).

998040899 is a wasteful number, since it uses less digits than its factorization.

998040899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63780.

The product of its (nonzero) digits is 1679616, while the sum is 56.

The square root of 998040899 is about 31591.7853088426. The cubic root of 998040899 is about 999.3465394156.

The spelling of 998040899 in words is "nine hundred ninety-eight million, forty thousand, eight hundred ninety-nine".