7873871531 has 4 divisors (see below), whose sum is σ = 7883257200. Its totient is φ = 7864485864.

The previous prime is 7873871479. The next prime is 7873871549. The reversal of 7873871531 is 1351783787.

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 7873871531 - 2¹⁴ = 7873855147 is a prime.

It is a super-2 number, since 2×7873871531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7873871531.

It is not an unprimeable number, because it can be changed into a prime (7873871581) 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, 4691576 + ... + 4693253.

It is an arithmetic number, because the mean of its divisors is an integer number (1970814300).

Almost surely, 2^7873871531 is an apocalyptic number.

7873871531 is a deficient number, since it is larger than the sum of its proper divisors (9385669).

7873871531 is an equidigital number, since it uses as much as digits as its factorization.

7873871531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9385668.

The product of its digits is 987840, while the sum is 50.

The square root of 7873871531 is about 88734.8383161879. The cubic root of 7873871531 is about 1989.4335678169.

The spelling of 7873871531 in words is "seven billion, eight hundred seventy-three million, eight hundred seventy-one thousand, five hundred thirty-one".