86778698 has 4 divisors (see below), whose sum is σ = 130168050. Its totient is φ = 43389348.

The previous prime is 86778683. The next prime is 86778707. The reversal of 86778698 is 89687768.

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

It can be written as a sum of positive squares in only one way, i.e., 78730129 + 8048569 = 8873^2 + 2837^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 21694673 + ... + 21694676.

Almost surely, 2^86778698 is an apocalyptic number.

86778698 is a deficient number, since it is larger than the sum of its proper divisors (43389352).

86778698 is a wasteful number, since it uses less digits than its factorization.

86778698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43389351.

The product of its digits is 8128512, while the sum is 59.

The square root of 86778698 is about 9315.5084670672. The cubic root of 86778698 is about 442.7287344573.

The spelling of 86778698 in words is "eighty-six million, seven hundred seventy-eight thousand, six hundred ninety-eight".