86786405 has 4 divisors (see below), whose sum is σ = 104143692. Its totient is φ = 69429120.

The previous prime is 86786363. The next prime is 86786407. The reversal of 86786405 is 50468768.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19775809 + 67010596 = 4447^2 + 8186^2 .

It is not a de Polignac number, because 86786405 - 2¹⁶ = 86720869 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 (86786407) 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, 8678636 + ... + 8678645.

It is an arithmetic number, because the mean of its divisors is an integer number (26035923).

Almost surely, 2^86786405 is an apocalyptic number.

It is an amenable number.

86786405 is a deficient number, since it is larger than the sum of its proper divisors (17357287).

86786405 is a wasteful number, since it uses less digits than its factorization.

86786405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17357286.

The product of its (nonzero) digits is 322560, while the sum is 44.

The square root of 86786405 is about 9315.9221229033. The cubic root of 86786405 is about 442.7418406282.

The spelling of 86786405 in words is "eighty-six million, seven hundred eighty-six thousand, four hundred five".