3639427 has 4 divisors (see below), whose sum is σ = 3970296. Its totient is φ = 3308560.

The previous prime is 3639421. The next prime is 3639473. The reversal of 3639427 is 7249363.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3639427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3639392 and 3639401.

It is not an unprimeable number, because it can be changed into a prime (3639421) 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, 165418 + ... + 165439.

It is an arithmetic number, because the mean of its divisors is an integer number (992574).

Almost surely, 2^3639427 is an apocalyptic number.

3639427 is a deficient number, since it is larger than the sum of its proper divisors (330869).

3639427 is a wasteful number, since it uses less digits than its factorization.

3639427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330868.

The product of its digits is 27216, while the sum is 34.

The square root of 3639427 is about 1907.7282301208. The cubic root of 3639427 is about 153.8193614818.

The spelling of 3639427 in words is "three million, six hundred thirty-nine thousand, four hundred twenty-seven".