3698689 has 4 divisors (see below), whose sum is σ = 3826260. Its totient is φ = 3571120.

The previous prime is 3698683. The next prime is 3698693. The reversal of 3698689 is 9868963.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2585664 + 1113025 = 1608^2 + 1055^2 .

It is a cyclic number.

It is not a de Polignac number, because 3698689 - 2⁵ = 3698657 is a prime.

3698689 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3698683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63742 + ... + 63799.

It is an arithmetic number, because the mean of its divisors is an integer number (956565).

It is a Proth number, since it is equal to 903 ⋅ 2¹² + 1 and 903 < 2¹².

Almost surely, 2^3698689 is an apocalyptic number.

It is an amenable number.

3698689 is a deficient number, since it is larger than the sum of its proper divisors (127571).

3698689 is a wasteful number, since it uses less digits than its factorization.

3698689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127570.

The product of its digits is 559872, while the sum is 49.

The square root of 3698689 is about 1923.1975977522. The cubic root of 3698689 is about 154.6497676700.

The spelling of 3698689 in words is "three million, six hundred ninety-eight thousand, six hundred eighty-nine".