2609397 has 36 divisors (see below), whose sum is σ = 4502316. Its totient is φ = 1451520.

The previous prime is 2609377. The next prime is 2609401. The reversal of 2609397 is 7939062.

2609397 is a `hidden beast` number, since 260 + 9 + 397 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 509796 + 2099601 = 714^2 + 1449^2 .

It is not a de Polignac number, because 2609397 - 2¹⁸ = 2347253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2609357) 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 35 ways as a sum of consecutive naturals, for example, 26853 + ... + 26949.

2^2609397 is an apocalyptic number.

It is an amenable number.

2609397 is a deficient number, since it is larger than the sum of its proper divisors (1892919).

2609397 is a wasteful number, since it uses less digits than its factorization.

2609397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 2609397 is about 1615.3628075451. The cubic root of 2609397 is about 137.6723480690.

The spelling of 2609397 in words is "two million, six hundred nine thousand, three hundred ninety-seven".