3689969 has 4 divisors (see below), whose sum is σ = 3907044. Its totient is φ = 3472896.

The previous prime is 3689963. The next prime is 3689993. The reversal of 3689969 is 9699863.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9699863 = 2801 ⋅3463.

It can be written as a sum of positive squares in 2 ways, for example, as 2560000 + 1129969 = 1600^2 + 1063^2 .

It is not a de Polignac number, because 3689969 - 2¹⁶ = 3624433 is a prime.

It is a super-2 number, since 2×3689969² = 27231742441922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3689963) 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, 108512 + ... + 108545.

It is an arithmetic number, because the mean of its divisors is an integer number (976761).

Almost surely, 2^3689969 is an apocalyptic number.

It is an amenable number.

3689969 is a deficient number, since it is larger than the sum of its proper divisors (217075).

3689969 is a wasteful number, since it uses less digits than its factorization.

3689969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217074.

The product of its digits is 629856, while the sum is 50.

The square root of 3689969 is about 1920.9292022352. The cubic root of 3689969 is about 154.5281383451.

The spelling of 3689969 in words is "three million, six hundred eighty-nine thousand, nine hundred sixty-nine".