86913818 has 4 divisors (see below), whose sum is σ = 130370730. Its totient is φ = 43456908.

The previous prime is 86913817. The next prime is 86913821. The reversal of 86913818 is 81831968.

It is a happy number.

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., 73393489 + 13520329 = 8567^2 + 3677^2 .

It is not an unprimeable number, because it can be changed into a prime (86913817) 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 as a sum of consecutive naturals, namely, 21728453 + ... + 21728456.

Almost surely, 2^86913818 is an apocalyptic number.

86913818 is a deficient number, since it is larger than the sum of its proper divisors (43456912).

86913818 is a wasteful number, since it uses less digits than its factorization.

86913818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43456911.

The product of its digits is 82944, while the sum is 44.

The square root of 86913818 is about 9322.7580682972. The cubic root of 86913818 is about 442.9584009774.

The spelling of 86913818 in words is "eighty-six million, nine hundred thirteen thousand, eight hundred eighteen".