1591339 has 2 divisors, whose sum is σ = 1591340. Its totient is φ = 1591338.

The previous prime is 1591313. The next prime is 1591351. The reversal of 1591339 is 9331951.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1591339 - 2⁷ = 1591211 is a prime.

It is a Chen prime.

1591339 is a lucky number.

It is a nialpdrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 1591339.

It is not a weakly prime, because it can be changed into another prime (1594339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 795669 + 795670.

It is an arithmetic number, because the mean of its divisors is an integer number (795670).

2^1591339 is an apocalyptic number.

1591339 is a deficient number, since it is larger than the sum of its proper divisors (1).

1591339 is an equidigital number, since it uses as much as digits as its factorization.

1591339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3645, while the sum is 31.

The square root of 1591339 is about 1261.4828575926. The cubic root of 1591339 is about 116.7492866019.

The spelling of 1591339 in words is "one million, five hundred ninety-one thousand, three hundred thirty-nine".