12097639 has 4 divisors (see below), whose sum is σ = 12193024. Its totient is φ = 12002256.

The previous prime is 12097637. The next prime is 12097643. The reversal of 12097639 is 93679021.

12097639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a 4-Lehmer number, since φ(12097639) divides (12097639-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 12097639 - 2¹ = 12097637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12097598 and 12097607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12097637) 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, 47502 + ... + 47755.

It is an arithmetic number, because the mean of its divisors is an integer number (3048256).

Almost surely, 2^12097639 is an apocalyptic number.

12097639 is a deficient number, since it is larger than the sum of its proper divisors (95385).

12097639 is an equidigital number, since it uses as much as digits as its factorization.

12097639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95384.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 12097639 is about 3478.1660397399. The cubic root of 12097639 is about 229.5621095008.

The spelling of 12097639 in words is "twelve million, ninety-seven thousand, six hundred thirty-nine".