842988831 has 4 divisors (see below), whose sum is σ = 1123985112. Its totient is φ = 561992552.

The previous prime is 842988803. The next prime is 842988833. The reversal of 842988831 is 138889248.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 842988831 - 2⁶ = 842988767 is a prime.

It is a super-2 number, since 2×842988831² = 1421260338381493122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842988833) 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, 140498136 + ... + 140498141.

It is an arithmetic number, because the mean of its divisors is an integer number (280996278).

Almost surely, 2^842988831 is an apocalyptic number.

842988831 is a deficient number, since it is larger than the sum of its proper divisors (280996281).

842988831 is a wasteful number, since it uses less digits than its factorization.

842988831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280996280.

The product of its digits is 884736, while the sum is 51.

The square root of 842988831 is about 29034.2699408819. The cubic root of 842988831 is about 944.6565499771.

The spelling of 842988831 in words is "eight hundred forty-two million, nine hundred eighty-eight thousand, eight hundred thirty-one".