4397639 has 4 divisors (see below), whose sum is σ = 4402224. Its totient is φ = 4393056.

The previous prime is 4397599. The next prime is 4397651. The reversal of 4397639 is 9367934.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9367934 = 2 ⋅4683967.

It is a cyclic number.

It is not a de Polignac number, because 4397639 - 2⁸ = 4397383 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4397596 and 4397605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4394639) 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, 242 + ... + 2975.

It is an arithmetic number, because the mean of its divisors is an integer number (1100556).

Almost surely, 2^4397639 is an apocalyptic number.

4397639 is a deficient number, since it is larger than the sum of its proper divisors (4585).

4397639 is a wasteful number, since it uses less digits than its factorization.

4397639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4584.

The product of its digits is 122472, while the sum is 41.

The square root of 4397639 is about 2097.0548395309. The cubic root of 4397639 is about 163.8349395198.

The spelling of 4397639 in words is "four million, three hundred ninety-seven thousand, six hundred thirty-nine".