86809777 has 4 divisors (see below), whose sum is σ = 86829120. Its totient is φ = 86790436.

The previous prime is 86809759. The next prime is 86809781. The reversal of 86809777 is 77790868.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-86809777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86809757) by changing a digit.

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, 948 + ... + 13210.

It is an arithmetic number, because the mean of its divisors is an integer number (21707280).

Almost surely, 2^86809777 is an apocalyptic number.

It is an amenable number.

86809777 is a deficient number, since it is larger than the sum of its proper divisors (19343).

86809777 is a wasteful number, since it uses less digits than its factorization.

86809777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19342.

The product of its (nonzero) digits is 1185408, while the sum is 52.

The square root of 86809777 is about 9317.1764499767. The cubic root of 86809777 is about 442.7815812363.

The spelling of 86809777 in words is "eighty-six million, eight hundred nine thousand, seven hundred seventy-seven".