998073231 has 4 divisors (see below), whose sum is σ = 1330764312. Its totient is φ = 665382152.

The previous prime is 998073229. The next prime is 998073233. The reversal of 998073231 is 132370899.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (998073229) and next prime (998073233).

It is a cyclic number.

It is not a de Polignac number, because 998073231 - 2¹ = 998073229 is a prime.

It is a super-2 number, since 2×998073231² = 1992300348877558722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998073233) 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, 166345536 + ... + 166345541.

It is an arithmetic number, because the mean of its divisors is an integer number (332691078).

Almost surely, 2^998073231 is an apocalyptic number.

998073231 is a deficient number, since it is larger than the sum of its proper divisors (332691081).

998073231 is a wasteful number, since it uses less digits than its factorization.

998073231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332691080.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 998073231 is about 31592.2970200016. The cubic root of 998073231 is about 999.3573307314.

The spelling of 998073231 in words is "nine hundred ninety-eight million, seventy-three thousand, two hundred thirty-one".