5581397 has 2 divisors, whose sum is σ = 5581398. Its totient is φ = 5581396.

The previous prime is 5581393. The next prime is 5581403. The reversal of 5581397 is 7931855.

5581397 is nontrivially palindromic in base 2.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3066001 + 2515396 = 1751^2 + 1586^2 .

It is a cyclic number.

It is not a de Polignac number, because 5581397 - 2² = 5581393 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5581397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5581393) 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 as a sum of consecutive naturals, namely, 2790698 + 2790699.

It is an arithmetic number, because the mean of its divisors is an integer number (2790699).

Almost surely, 2^5581397 is an apocalyptic number.

It is an amenable number.

5581397 is a deficient number, since it is larger than the sum of its proper divisors (1).

5581397 is an equidigital number, since it uses as much as digits as its factorization.

5581397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 38.

The square root of 5581397 is about 2362.4980423272. The cubic root of 5581397 is about 177.3839431776.

The spelling of 5581397 in words is "five million, five hundred eighty-one thousand, three hundred ninety-seven".