1381881847 has 2 divisors, whose sum is σ = 1381881848. Its totient is φ = 1381881846.

The previous prime is 1381881763. The next prime is 1381881863. The reversal of 1381881847 is 7481881831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1381881847 - 2⁷ = 1381881719 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1381881847.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1381881047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690940923 + 690940924.

It is an arithmetic number, because the mean of its divisors is an integer number (690940924).

Almost surely, 2^1381881847 is an apocalyptic number.

1381881847 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381881847 is an equidigital number, since it uses as much as digits as its factorization.

1381881847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 344064, while the sum is 49.

The square root of 1381881847 is about 37173.6714221235. The cubic root of 1381881847 is about 1113.8421213558.

The spelling of 1381881847 in words is "one billion, three hundred eighty-one million, eight hundred eighty-one thousand, eight hundred forty-seven".