86776505 has 4 divisors (see below), whose sum is σ = 104131812. Its totient is φ = 69421200.

The previous prime is 86776421. The next prime is 86776559. The reversal of 86776505 is 50567768.

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 27962944 + 58813561 = 5288^2 + 7669^2 .

It is not a de Polignac number, because 86776505 - 2²⁴ = 69999289 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8677646 + ... + 8677655.

It is an arithmetic number, because the mean of its divisors is an integer number (26032953).

Almost surely, 2^86776505 is an apocalyptic number.

It is an amenable number.

86776505 is a deficient number, since it is larger than the sum of its proper divisors (17355307).

86776505 is a wasteful number, since it uses less digits than its factorization.

86776505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17355306.

The product of its (nonzero) digits is 352800, while the sum is 44.

The square root of 86776505 is about 9315.3907593831. The cubic root of 86776505 is about 442.7250050002.

The spelling of 86776505 in words is "eighty-six million, seven hundred seventy-six thousand, five hundred five".