1381613 has 2 divisors, whose sum is σ = 1381614. Its totient is φ = 1381612.

The previous prime is 1381609. The next prime is 1381621. The reversal of 1381613 is 3161831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1087849 + 293764 = 1043^2 + 542^2 .

It is a cyclic number.

It is not a de Polignac number, because 1381613 - 2² = 1381609 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1381643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690806 + 690807.

It is an arithmetic number, because the mean of its divisors is an integer number (690807).

2^1381613 is an apocalyptic number.

It is an amenable number.

1381613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381613 is an equidigital number, since it uses as much as digits as its factorization.

1381613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 23.

The square root of 1381613 is about 1175.4203503428. The cubic root of 1381613 is about 111.3769883503.

The spelling of 1381613 in words is "one million, three hundred eighty-one thousand, six hundred thirteen".