1339813 has 2 divisors, whose sum is σ = 1339814. Its totient is φ = 1339812.

The previous prime is 1339781. The next prime is 1339817. The reversal of 1339813 is 3189331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1329409 + 10404 = 1153^2 + 102^2 .

It is an emirp because it is prime and its reverse (3189331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1339813 - 2⁵ = 1339781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1339817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669906 + 669907.

It is an arithmetic number, because the mean of its divisors is an integer number (669907).

2^1339813 is an apocalyptic number.

It is an amenable number.

1339813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1339813 is an equidigital number, since it uses as much as digits as its factorization.

1339813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 28.

The square root of 1339813 is about 1157.5029157631. The cubic root of 1339813 is about 110.2422484836.

The spelling of 1339813 in words is "one million, three hundred thirty-nine thousand, eight hundred thirteen".