842685031 has 2 divisors, whose sum is σ = 842685032. Its totient is φ = 842685030.

The previous prime is 842685029. The next prime is 842685071. The reversal of 842685031 is 130586248.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 842685031 - 2¹ = 842685029 is a prime.

It is a super-2 number, since 2×842685031² = 1420236122942941922, which contains 22 as substring.

Together with 842685029, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (842685071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421342515 + 421342516.

It is an arithmetic number, because the mean of its divisors is an integer number (421342516).

Almost surely, 2^842685031 is an apocalyptic number.

842685031 is a deficient number, since it is larger than the sum of its proper divisors (1).

842685031 is an equidigital number, since it uses as much as digits as its factorization.

842685031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 842685031 is about 29029.0377208753. The cubic root of 842685031 is about 944.5430565232.

The spelling of 842685031 in words is "eight hundred forty-two million, six hundred eighty-five thousand, thirty-one".