3689709 has 4 divisors (see below), whose sum is σ = 4919616. Its totient is φ = 2459804.

The previous prime is 3689689. The next prime is 3689711. The reversal of 3689709 is 9079863.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3689709 - 2²¹ = 1592557 is a prime.

It is a super-2 number, since 2×3689709² = 27227905009362, which contains 22 as substring.

It is a D-number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3689779) 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, 614949 + ... + 614954.

It is an arithmetic number, because the mean of its divisors is an integer number (1229904).

Almost surely, 2^3689709 is an apocalyptic number.

It is an amenable number.

3689709 is a deficient number, since it is larger than the sum of its proper divisors (1229907).

3689709 is a wasteful number, since it uses less digits than its factorization.

3689709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229906.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 3689709 is about 1920.8615254619. The cubic root of 3689709 is about 154.5245088422.

The spelling of 3689709 in words is "three million, six hundred eighty-nine thousand, seven hundred nine".