86786389 has 4 divisors (see below), whose sum is σ = 87240960. Its totient is φ = 86331820.

The previous prime is 86786363. The next prime is 86786407. The reversal of 86786389 is 98368768.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86786389 - 2²¹ = 84689237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86786489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226999 + ... + 227380.

It is an arithmetic number, because the mean of its divisors is an integer number (21810240).

Almost surely, 2^86786389 is an apocalyptic number.

It is an amenable number.

86786389 is a deficient number, since it is larger than the sum of its proper divisors (454571).

86786389 is a wasteful number, since it uses less digits than its factorization.

86786389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454570.

The product of its digits is 3483648, while the sum is 55.

The square root of 86786389 is about 9315.9212641585. The cubic root of 86786389 is about 442.7418134201.

The spelling of 86786389 in words is "eighty-six million, seven hundred eighty-six thousand, three hundred eighty-nine".