2397639 has 16 divisors (see below), whose sum is σ = 3324384. Its totient is φ = 1536000.

The previous prime is 2397631. The next prime is 2397641. The reversal of 2397639 is 9367932.

2397639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2397639 - 2³ = 2397631 is a prime.

It is a d-powerful number, because it can be written as 2²¹ + 3⁶ + 9 + 7² + 6⁷ + 3⁹ + 9² .

2397639 is a lucky number.

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 2397597 and 2397606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2397631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12327 + ... + 12519.

It is an arithmetic number, because the mean of its divisors is an integer number (207774).

2^2397639 is an apocalyptic number.

2397639 is a deficient number, since it is larger than the sum of its proper divisors (926745).

2397639 is a wasteful number, since it uses less digits than its factorization.

2397639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338.

The product of its digits is 61236, while the sum is 39.

The square root of 2397639 is about 1548.4311415107. The cubic root of 2397639 is about 133.8426719675.

The spelling of 2397639 in words is "two million, three hundred ninety-seven thousand, six hundred thirty-nine".