2656397 has 4 divisors (see below), whose sum is σ = 2692860. Its totient is φ = 2619936.

The previous prime is 2656391. The next prime is 2656399. The reversal of 2656397 is 7936562.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2157961 + 498436 = 1469^2 + 706^2 .

It is a cyclic number.

It is not a de Polignac number, because 2656397 - 2⁸ = 2656141 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 2656397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2656391) 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, 18122 + ... + 18267.

It is an arithmetic number, because the mean of its divisors is an integer number (673215).

2^2656397 is an apocalyptic number.

It is an amenable number.

2656397 is a deficient number, since it is larger than the sum of its proper divisors (36463).

2656397 is an equidigital number, since it uses as much as digits as its factorization.

2656397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36462.

The product of its digits is 68040, while the sum is 38.

The square root of 2656397 is about 1629.8456982181. The cubic root of 2656397 is about 138.4940111318.

The spelling of 2656397 in words is "two million, six hundred fifty-six thousand, three hundred ninety-seven".