538741993 has 2 divisors, whose sum is σ = 538741994. Its totient is φ = 538741992.

The previous prime is 538741981. The next prime is 538741999. The reversal of 538741993 is 399147835.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 526610704 + 12131289 = 22948^2 + 3483^2 .

It is a cyclic number.

It is not a de Polignac number, because 538741993 - 2¹⁷ = 538610921 is a prime.

It is a super-2 number, since 2×538741993² = 580485870043224098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (538741999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269370996 + 269370997.

It is an arithmetic number, because the mean of its divisors is an integer number (269370997).

Almost surely, 2^538741993 is an apocalyptic number.

It is an amenable number.

538741993 is a deficient number, since it is larger than the sum of its proper divisors (1).

538741993 is an equidigital number, since it uses as much as digits as its factorization.

538741993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 49.

The square root of 538741993 is about 23210.8162932715. The cubic root of 538741993 is about 813.6924309932.

The spelling of 538741993 in words is "five hundred thirty-eight million, seven hundred forty-one thousand, nine hundred ninety-three".