86778933 has 16 divisors (see below), whose sum is σ = 120806400. Its totient is φ = 55339200.

The previous prime is 86778917. The next prime is 86778953. The reversal of 86778933 is 33987768.

It is not a de Polignac number, because 86778933 - 2⁴ = 86778917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86778953) 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 15 ways as a sum of consecutive naturals, for example, 4908 + ... + 14058.

It is an arithmetic number, because the mean of its divisors is an integer number (7550400).

Almost surely, 2^86778933 is an apocalyptic number.

It is an amenable number.

86778933 is a deficient number, since it is larger than the sum of its proper divisors (34027467).

86778933 is a wasteful number, since it uses less digits than its factorization.

86778933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9292.

The product of its digits is 1524096, while the sum is 51.

The square root of 86778933 is about 9315.5210804335. The cubic root of 86778933 is about 442.7291340989.

It can be divided in two parts, 867 and 78933, that added together give a triangular number (79800 = T₃₉₉).

The spelling of 86778933 in words is "eighty-six million, seven hundred seventy-eight thousand, nine hundred thirty-three".