86423985 has 12 divisors (see below), whose sum is σ = 149801652. Its totient is φ = 46092768.

The previous prime is 86423977. The next prime is 86424011. The reversal of 86423985 is 58932468.

It can be written as a sum of positive squares in 2 ways, for example, as 63728289 + 22695696 = 7983^2 + 4764^2 .

It is not a de Polignac number, because 86423985 - 2³ = 86423977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1920533 = 86423985 / (8 + 6 + 4 + 2 + 3 + 9 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 86423985.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 960222 + ... + 960311.

It is an arithmetic number, because the mean of its divisors is an integer number (12483471).

Almost surely, 2^86423985 is an apocalyptic number.

It is an amenable number.

86423985 is a deficient number, since it is larger than the sum of its proper divisors (63377667).

86423985 is a wasteful number, since it uses less digits than its factorization.

86423985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920544 (or 1920541 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 86423985 is about 9296.4501289471. The cubic root of 86423985 is about 442.1246841518.

It can be divided in two parts, 8642398 and 5, that added together give a triangular number (8642403 = T₄₁₅₇).

The spelling of 86423985 in words is "eighty-six million, four hundred twenty-three thousand, nine hundred eighty-five".