1391703147689 has 2 divisors, whose sum is σ = 1391703147690. Its totient is φ = 1391703147688.

The previous prime is 1391703147647. The next prime is 1391703147701. The reversal of 1391703147689 is 9867413071931.

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., 1012253307664 + 379449840025 = 1006108^2 + 615995^2 .

It is an emirp because it is prime and its reverse (9867413071931) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1391703147689 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1391703143689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695851573844 + 695851573845.

It is an arithmetic number, because the mean of its divisors is an integer number (695851573845).

Almost surely, 2^{1391703147689} is an apocalyptic number.

It is an amenable number.

1391703147689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1391703147689 is an equidigital number, since it uses as much as digits as its factorization.

1391703147689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6858432, while the sum is 59.

The spelling of 1391703147689 in words is "one trillion, three hundred ninety-one billion, seven hundred three million, one hundred forty-seven thousand, six hundred eighty-nine".