3696639 has 4 divisors (see below), whose sum is σ = 4928856. Its totient is φ = 2464424.

The previous prime is 3696619. The next prime is 3696643. The reversal of 3696639 is 9366963.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9366963 = 3 ⋅3122321.

It is a cyclic number.

It is not a de Polignac number, because 3696639 - 2⁸ = 3696383 is a prime.

It is a D-number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 3696639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3696619) 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, 616104 + ... + 616109.

It is an arithmetic number, because the mean of its divisors is an integer number (1232214).

Almost surely, 2^3696639 is an apocalyptic number.

3696639 is a deficient number, since it is larger than the sum of its proper divisors (1232217).

3696639 is a wasteful number, since it uses less digits than its factorization.

3696639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1232216.

The product of its digits is 157464, while the sum is 42.

The square root of 3696639 is about 1922.6645573266. The cubic root of 3696639 is about 154.6211908225.

It can be divided in two parts, 369 and 6639, that multiplied together give a triangular number (2449791 = T₂₂₁₃).

The spelling of 3696639 in words is "three million, six hundred ninety-six thousand, six hundred thirty-nine".