8691604 has 6 divisors (see below), whose sum is σ = 15210314. Its totient is φ = 4345800.

The previous prime is 8691593. The next prime is 8691623. The reversal of 8691604 is 4061968.

It can be written as a sum of positive squares in only one way, i.e., 8690704 + 900 = 2948^2 + 30^2 .

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 8691604.

It is a congruent number.

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, 1086447 + ... + 1086454.

Almost surely, 2^8691604 is an apocalyptic number.

It is an amenable number.

8691604 is a deficient number, since it is larger than the sum of its proper divisors (6518710).

8691604 is a wasteful number, since it uses less digits than its factorization.

8691604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2172905 (or 2172903 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 8691604 is about 2948.1526419098. The cubic root of 8691604 is about 205.6048288772.

The spelling of 8691604 in words is "eight million, six hundred ninety-one thousand, six hundred four".