1373539 has 2 divisors, whose sum is σ = 1373540. Its totient is φ = 1373538.

The previous prime is 1373531. The next prime is 1373543. The reversal of 1373539 is 9353731.

It is a strong prime.

It is an emirp because it is prime and its reverse (9353731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1373539 - 2³ = 1373531 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1373539.

It is not a weakly prime, because it can be changed into another prime (1373531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686769 + 686770.

It is an arithmetic number, because the mean of its divisors is an integer number (686770).

2^1373539 is an apocalyptic number.

1373539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1373539 is an equidigital number, since it uses as much as digits as its factorization.

1373539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8505, while the sum is 31.

The square root of 1373539 is about 1171.9808018905. The cubic root of 1373539 is about 111.1596059053.

It can be divided in two parts, 1373 and 539, that multiplied together give a palindrome (740047).

The spelling of 1373539 in words is "one million, three hundred seventy-three thousand, five hundred thirty-nine".