3690689 has 2 divisors, whose sum is σ = 3690690. Its totient is φ = 3690688.

The previous prime is 3690677. The next prime is 3690691. The reversal of 3690689 is 9860963.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2755600 + 935089 = 1660^2 + 967^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3690689 is a prime.

Together with 3690691, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3690619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1845344 + 1845345.

It is an arithmetic number, because the mean of its divisors is an integer number (1845345).

Almost surely, 2^3690689 is an apocalyptic number.

It is an amenable number.

3690689 is a deficient number, since it is larger than the sum of its proper divisors (1).

3690689 is an equidigital number, since it uses as much as digits as its factorization.

3690689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 3690689 is about 1921.1166023956. The cubic root of 3690689 is about 154.5381883865.

Adding to 3690689 its product of nonzero digits (69984), we get a palindrome (3760673).

The spelling of 3690689 in words is "three million, six hundred ninety thousand, six hundred eighty-nine".