3639694 has 4 divisors (see below), whose sum is σ = 5459544. Its totient is φ = 1819846.

The previous prime is 3639689. The next prime is 3639719. The reversal of 3639694 is 4969363.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4969363 = 7 ⋅709909.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 909922 + ... + 909925.

It is an arithmetic number, because the mean of its divisors is an integer number (1364886).

Almost surely, 2^3639694 is an apocalyptic number.

3639694 is a deficient number, since it is larger than the sum of its proper divisors (1819850).

3639694 is a wasteful number, since it uses less digits than its factorization.

3639694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1819849.

The product of its digits is 104976, while the sum is 40.

The square root of 3639694 is about 1907.7982073584. The cubic root of 3639694 is about 153.8231229499.

The spelling of 3639694 in words is "three million, six hundred thirty-nine thousand, six hundred ninety-four".