8765432131 has 2 divisors, whose sum is σ = 8765432132. Its totient is φ = 8765432130.

The previous prime is 8765432129. The next prime is 8765432153. The reversal of 8765432131 is 1312345678.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8765432131 - 2¹ = 8765432129 is a prime.

It is a super-2 number, since 2×8765432131² (a number of 21 digits) contains 22 as substring.

Together with 8765432129, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (8765432191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4382716065 + 4382716066.

It is an arithmetic number, because the mean of its divisors is an integer number (4382716066).

Almost surely, 2^8765432131 is an apocalyptic number.

8765432131 is a deficient number, since it is larger than the sum of its proper divisors (1).

8765432131 is an equidigital number, since it uses as much as digits as its factorization.

8765432131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 40.

The square root of 8765432131 is about 93623.8865407755. The cubic root of 8765432131 is about 2061.8533710710.

It can be divided in two parts, 8765 and 432131, that added together give a square (440896 = 664²).

The spelling of 8765432131 in words is "eight billion, seven hundred sixty-five million, four hundred thirty-two thousand, one hundred thirty-one".