981795541 has 2 divisors, whose sum is σ = 981795542. Its totient is φ = 981795540.

The previous prime is 981795539. The next prime is 981795557. The reversal of 981795541 is 145597189.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 503104900 + 478690641 = 22430^2 + 21879^2 .

It is a cyclic number.

It is not a de Polignac number, because 981795541 - 2¹ = 981795539 is a prime.

Together with 981795539, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981795511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490897770 + 490897771.

It is an arithmetic number, because the mean of its divisors is an integer number (490897771).

Almost surely, 2^981795541 is an apocalyptic number.

It is an amenable number.

981795541 is a deficient number, since it is larger than the sum of its proper divisors (1).

981795541 is an equidigital number, since it uses as much as digits as its factorization.

981795541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 453600, while the sum is 49.

The square root of 981795541 is about 31333.6167877250. The cubic root of 981795541 is about 993.8946475309.

The spelling of 981795541 in words is "nine hundred eighty-one million, seven hundred ninety-five thousand, five hundred forty-one".