1339391 has 2 divisors, whose sum is σ = 1339392. Its totient is φ = 1339390.

The previous prime is 1339381. The next prime is 1339399. The reversal of 1339391 is 1939331.

It is a strong prime.

It is an emirp because it is prime and its reverse (1939331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1339391 - 2¹⁰ = 1338367 is a prime.

It is a Chen prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1339399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669695 + 669696.

It is an arithmetic number, because the mean of its divisors is an integer number (669696).

2^1339391 is an apocalyptic number.

1339391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1339391 is an equidigital number, since it uses as much as digits as its factorization.

1339391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2187, while the sum is 29.

The square root of 1339391 is about 1157.3206124493. The cubic root of 1339391 is about 110.2306729593.

The spelling of 1339391 in words is "one million, three hundred thirty-nine thousand, three hundred ninety-one".