541993909 has 2 divisors, whose sum is σ = 541993910. Its totient is φ = 541993908.

The previous prime is 541993861. The next prime is 541993913. The reversal of 541993909 is 909399145.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 537219684 + 4774225 = 23178^2 + 2185^2 .

It is a cyclic number.

It is not a de Polignac number, because 541993909 - 2¹¹ = 541991861 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (541993409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270996954 + 270996955.

It is an arithmetic number, because the mean of its divisors is an integer number (270996955).

Almost surely, 2^541993909 is an apocalyptic number.

It is an amenable number.

541993909 is a deficient number, since it is larger than the sum of its proper divisors (1).

541993909 is an equidigital number, since it uses as much as digits as its factorization.

541993909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 393660, while the sum is 49.

The square root of 541993909 is about 23280.7626378519. The cubic root of 541993909 is about 815.3263319864.

The spelling of 541993909 in words is "five hundred forty-one million, nine hundred ninety-three thousand, nine hundred nine".