4097639 has 16 divisors (see below), whose sum is σ = 5183808. Its totient is φ = 3151872.

The previous prime is 4097633. The next prime is 4097647. The reversal of 4097639 is 9367904.

It is a cyclic number.

It is not a de Polignac number, because 4097639 - 2⁸ = 4097383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4097633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2759 + ... + 3975.

It is an arithmetic number, because the mean of its divisors is an integer number (323988).

Almost surely, 2^4097639 is an apocalyptic number.

4097639 is a deficient number, since it is larger than the sum of its proper divisors (1086169).

4097639 is a wasteful number, since it uses less digits than its factorization.

4097639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 4097639 is about 2024.2625817813. The cubic root of 4097639 is about 160.0213382999.

It can be divided in two parts, 40 and 97639, that added together give a palindrome (97679).

The spelling of 4097639 in words is "four million, ninety-seven thousand, six hundred thirty-nine".