1681141541 has 2 divisors, whose sum is σ = 1681141542. Its totient is φ = 1681141540.

The previous prime is 1681141529. The next prime is 1681141547. The reversal of 1681141541 is 1451411861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1671092641 + 10048900 = 40879^2 + 3170^2 .

It is an emirp because it is prime and its reverse (1451411861) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1681141541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1681141498 and 1681141507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1681141547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840570770 + 840570771.

It is an arithmetic number, because the mean of its divisors is an integer number (840570771).

Almost surely, 2^1681141541 is an apocalyptic number.

It is an amenable number.

1681141541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1681141541 is an equidigital number, since it uses as much as digits as its factorization.

1681141541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3840, while the sum is 32.

The square root of 1681141541 is about 41001.7260734228. The cubic root of 1681141541 is about 1189.0535847733.

The spelling of 1681141541 in words is "one billion, six hundred eighty-one million, one hundred forty-one thousand, five hundred forty-one".