5991397 has 2 divisors, whose sum is σ = 5991398. Its totient is φ = 5991396.

The previous prime is 5991389. The next prime is 5991413. The reversal of 5991397 is 7931995.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5755201 + 236196 = 2399^2 + 486^2 .

It is a cyclic number.

It is not a de Polignac number, because 5991397 - 2³ = 5991389 is a prime.

It is an Ulam number.

5991397 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5991367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2995698 + 2995699.

It is an arithmetic number, because the mean of its divisors is an integer number (2995699).

Almost surely, 2^5991397 is an apocalyptic number.

It is an amenable number.

5991397 is a deficient number, since it is larger than the sum of its proper divisors (1).

5991397 is an equidigital number, since it uses as much as digits as its factorization.

5991397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 76545, while the sum is 43.

The square root of 5991397 is about 2447.7330328285. The cubic root of 5991397 is about 181.6251694722.

The spelling of 5991397 in words is "five million, nine hundred ninety-one thousand, three hundred ninety-seven".