842840999 has 32 divisors (see below), whose sum is σ = 1139443200. Its totient is φ = 602064000.

The previous prime is 842840993. The next prime is 842841001. The reversal of 842840999 is 999048248.

It is a cyclic number.

It is not a de Polignac number, because 842840999 - 2⁴ = 842840983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 842840999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842840993) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 146324 + ... + 151974.

It is an arithmetic number, because the mean of its divisors is an integer number (35607600).

Almost surely, 2^842840999 is an apocalyptic number.

842840999 is a deficient number, since it is larger than the sum of its proper divisors (296602201).

842840999 is a wasteful number, since it uses less digits than its factorization.

842840999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5831.

The product of its (nonzero) digits is 1492992, while the sum is 53.

The square root of 842840999 is about 29031.7240101238. The cubic root of 842840999 is about 944.6013263782.

The spelling of 842840999 in words is "eight hundred forty-two million, eight hundred forty thousand, nine hundred ninety-nine".