86778577 has 4 divisors (see below), whose sum is σ = 87877120. Its totient is φ = 85680036.

The previous prime is 86778569. The next prime is 86778581. The reversal of 86778577 is 77587768.

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 86778577 - 2³ = 86778569 is a prime.

It is a super-2 number, since 2×86778577² = 15061042852289858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86778547) 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, 549153 + ... + 549310.

It is an arithmetic number, because the mean of its divisors is an integer number (21969280).

Almost surely, 2^86778577 is an apocalyptic number.

It is an amenable number.

86778577 is a deficient number, since it is larger than the sum of its proper divisors (1098543).

86778577 is a wasteful number, since it uses less digits than its factorization.

86778577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098542.

The product of its digits is 4609920, while the sum is 55.

The square root of 86778577 is about 9315.5019725187. The cubic root of 86778577 is about 442.7285286840.

The spelling of 86778577 in words is "eighty-six million, seven hundred seventy-eight thousand, five hundred seventy-seven".