8442531837 has 6 divisors (see below), whose sum is σ = 12194768222. Its totient is φ = 5628354552.

The previous prime is 8442531787. The next prime is 8442531841. The reversal of 8442531837 is 7381352448.

8442531837 is a `hidden beast` number, since 84 + 4 + 2 + 531 + 8 + 37 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8393124996 + 49406841 = 91614^2 + 7029^2 .

It is not a de Polignac number, because 8442531837 - 2¹⁵ = 8442499069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8442531792 and 8442531801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8442531037) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 469029538 + ... + 469029555.

Almost surely, 2^8442531837 is an apocalyptic number.

It is an amenable number.

8442531837 is a deficient number, since it is larger than the sum of its proper divisors (3752236385).

8442531837 is a wasteful number, since it uses less digits than its factorization.

8442531837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938059099 (or 938059096 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 8442531837 is about 91883.2511233685. The cubic root of 8442531837 is about 2036.2178285274.

The spelling of 8442531837 in words is "eight billion, four hundred forty-two million, five hundred thirty-one thousand, eight hundred thirty-seven".