2591397 has 6 divisors (see below), whose sum is σ = 3743142. Its totient is φ = 1727592.

The previous prime is 2591389. The next prime is 2591401. The reversal of 2591397 is 7931952.

2591397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2556801 + 34596 = 1599^2 + 186^2 .

It is not a de Polignac number, because 2591397 - 2³ = 2591389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2590397) 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 5 ways as a sum of consecutive naturals, for example, 143958 + ... + 143975.

It is an arithmetic number, because the mean of its divisors is an integer number (623857).

2^2591397 is an apocalyptic number.

It is an amenable number.

2591397 is a deficient number, since it is larger than the sum of its proper divisors (1151745).

2591397 is a wasteful number, since it uses less digits than its factorization.

2591397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287939 (or 287936 counting only the distinct ones).

The product of its digits is 17010, while the sum is 36.

The square root of 2591397 is about 1609.7816622139. The cubic root of 2591397 is about 137.3550560783.

The spelling of 2591397 in words is "two million, five hundred ninety-one thousand, three hundred ninety-seven".