538338791 has 2 divisors, whose sum is σ = 538338792. Its totient is φ = 538338790.

The previous prime is 538338763. The next prime is 538338793. The reversal of 538338791 is 197833835.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 538338791 - 2⁶ = 538338727 is a prime.

Together with 538338793, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (538338793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269169395 + 269169396.

It is an arithmetic number, because the mean of its divisors is an integer number (269169396).

Almost surely, 2^538338791 is an apocalyptic number.

538338791 is a deficient number, since it is larger than the sum of its proper divisors (1).

538338791 is an equidigital number, since it uses as much as digits as its factorization.

538338791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 47.

The square root of 538338791 is about 23202.1290186914. The cubic root of 538338791 is about 813.4893874207.

The spelling of 538338791 in words is "five hundred thirty-eight million, three hundred thirty-eight thousand, seven hundred ninety-one".