541021997 has 2 divisors, whose sum is σ = 541021998. Its totient is φ = 541021996.

The previous prime is 541021973. The next prime is 541022033. The reversal of 541021997 is 799120145.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 533656201 + 7365796 = 23101^2 + 2714^2 .

It is a cyclic number.

It is not a de Polignac number, because 541021997 - 2¹² = 541017901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 541021997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (541021967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270510998 + 270510999.

It is an arithmetic number, because the mean of its divisors is an integer number (270510999).

Almost surely, 2^541021997 is an apocalyptic number.

It is an amenable number.

541021997 is a deficient number, since it is larger than the sum of its proper divisors (1).

541021997 is an equidigital number, since it uses as much as digits as its factorization.

541021997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 541021997 is about 23259.8795568679. The cubic root of 541021997 is about 814.8386883871.

The spelling of 541021997 in words is "five hundred forty-one million, twenty-one thousand, nine hundred ninety-seven".