873856431 has 24 divisors (see below), whose sum is σ = 1495987584. Its totient is φ = 499345560.

The previous prime is 873856409. The next prime is 873856433. The reversal of 873856431 is 134658378.

873856431 is a `hidden beast` number, since 87 + 3 + 8 + 564 + 3 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-873856431 is a prime.

It is a super-2 number, since 2×873856431² = 1527250124000115522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (873856433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 255165 + ... + 258566.

It is an arithmetic number, because the mean of its divisors is an integer number (62332816).

Almost surely, 2^873856431 is an apocalyptic number.

873856431 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

873856431 is a deficient number, since it is larger than the sum of its proper divisors (622131153).

873856431 is an equidigital number, since it uses as much as digits as its factorization.

873856431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513753 (or 513741 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 873856431 is about 29561.0627515318. The cubic root of 873856431 is about 956.0487299583.

The spelling of 873856431 in words is "eight hundred seventy-three million, eight hundred fifty-six thousand, four hundred thirty-one".