1413835781 has 2 divisors, whose sum is σ = 1413835782. Its totient is φ = 1413835780.

The previous prime is 1413835751. The next prime is 1413835793. The reversal of 1413835781 is 1875383141.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 981819556 + 432016225 = 31334^2 + 20785^2 .

It is an emirp because it is prime and its reverse (1875383141) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1413835781 - 2¹⁰ = 1413834757 is a prime.

It is a super-2 number, since 2×1413835781² = 3997863231271759922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1413835741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 706917890 + 706917891.

It is an arithmetic number, because the mean of its divisors is an integer number (706917891).

Almost surely, 2^1413835781 is an apocalyptic number.

It is an amenable number.

1413835781 is a deficient number, since it is larger than the sum of its proper divisors (1).

1413835781 is an equidigital number, since it uses as much as digits as its factorization.

1413835781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 41.

The square root of 1413835781 is about 37601.0077125600. The cubic root of 1413835781 is about 1122.3620909834.

The spelling of 1413835781 in words is "one billion, four hundred thirteen million, eight hundred thirty-five thousand, seven hundred eighty-one".