86845431 has 4 divisors (see below), whose sum is σ = 115793912. Its totient is φ = 57896952.

The previous prime is 86845427. The next prime is 86845439. The reversal of 86845431 is 13454868.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 86845431 - 2² = 86845427 is a prime.

It is a super-2 number, since 2×86845431² = 15084257771151522, which 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 86845431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86845439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14474236 + ... + 14474241.

It is an arithmetic number, because the mean of its divisors is an integer number (28948478).

Almost surely, 2^86845431 is an apocalyptic number.

86845431 is a deficient number, since it is larger than the sum of its proper divisors (28948481).

86845431 is a wasteful number, since it uses less digits than its factorization.

86845431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28948480.

The product of its digits is 92160, while the sum is 39.

The square root of 86845431 is about 9319.0896014579. The cubic root of 86845431 is about 442.8421918197.

The spelling of 86845431 in words is "eighty-six million, eight hundred forty-five thousand, four hundred thirty-one".