538732993 has 2 divisors, whose sum is σ = 538732994. Its totient is φ = 538732992.

The previous prime is 538732949. The next prime is 538733023. The reversal of 538732993 is 399237835.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 528448144 + 10284849 = 22988^2 + 3207^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-538732993 is a prime.

It is not a weakly prime, because it can be changed into another prime (538732393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269366496 + 269366497.

It is an arithmetic number, because the mean of its divisors is an integer number (269366497).

Almost surely, 2^538732993 is an apocalyptic number.

It is an amenable number.

538732993 is a deficient number, since it is larger than the sum of its proper divisors (1).

538732993 is an equidigital number, since it uses as much as digits as its factorization.

538732993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1224720, while the sum is 49.

The square root of 538732993 is about 23210.6224173330. The cubic root of 538732993 is about 813.6878998987.

The spelling of 538732993 in words is "five hundred thirty-eight million, seven hundred thirty-two thousand, nine hundred ninety-three".