1681341593 has 2 divisors, whose sum is σ = 1681341594. Its totient is φ = 1681341592.

The previous prime is 1681341583. The next prime is 1681341619. The reversal of 1681341593 is 3951431861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1608972544 + 72369049 = 40112^2 + 8507^2 .

It is a cyclic number.

It is not a de Polignac number, because 1681341593 - 2²⁶ = 1614232729 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1681341593.

It is not a weakly prime, because it can be changed into another prime (1681341583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840670796 + 840670797.

It is an arithmetic number, because the mean of its divisors is an integer number (840670797).

Almost surely, 2^1681341593 is an apocalyptic number.

It is an amenable number.

1681341593 is a deficient number, since it is larger than the sum of its proper divisors (1).

1681341593 is an equidigital number, since it uses as much as digits as its factorization.

1681341593 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 41.

The square root of 1681341593 is about 41004.1655566846. The cubic root of 1681341593 is about 1189.1007477886.

The spelling of 1681341593 in words is "one billion, six hundred eighty-one million, three hundred forty-one thousand, five hundred ninety-three".