86864431 has 4 divisors (see below), whose sum is σ = 86898592. Its totient is φ = 86830272.

The previous prime is 86864417. The next prime is 86864473. The reversal of 86864431 is 13446868.

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 86864431 - 2⁹ = 86863919 is a prime.

It is a super-2 number, since 2×86864431² = 15090858745907522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86864731) 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, 12930 + ... + 18463.

It is an arithmetic number, because the mean of its divisors is an integer number (21724648).

Almost surely, 2^86864431 is an apocalyptic number.

86864431 is a deficient number, since it is larger than the sum of its proper divisors (34161).

86864431 is a wasteful number, since it uses less digits than its factorization.

86864431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34160.

The product of its digits is 110592, while the sum is 40.

The square root of 86864431 is about 9320.1089585906. The cubic root of 86864431 is about 442.8744843960.

The spelling of 86864431 in words is "eighty-six million, eight hundred sixty-four thousand, four hundred thirty-one".