3690989 has 4 divisors (see below), whose sum is σ = 3908124. Its totient is φ = 3473856.

The previous prime is 3690983. The next prime is 3691003. The reversal of 3690989 is 9890963.

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 1646089 + 2044900 = 1283^2 + 1430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3690989 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3690983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108542 + ... + 108575.

It is an arithmetic number, because the mean of its divisors is an integer number (977031).

Almost surely, 2^3690989 is an apocalyptic number.

It is an amenable number.

3690989 is a deficient number, since it is larger than the sum of its proper divisors (217135).

3690989 is a wasteful number, since it uses less digits than its factorization.

3690989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217134.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 3690989 is about 1921.1946804007. The cubic root of 3690989 is about 154.5423755180.

The spelling of 3690989 in words is "three million, six hundred ninety thousand, nine hundred eighty-nine".