538333421 has 2 divisors, whose sum is σ = 538333422. Its totient is φ = 538333420.

The previous prime is 538333391. The next prime is 538333447. The reversal of 538333421 is 124333835.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 296872900 + 241460521 = 17230^2 + 15539^2 .

It is a cyclic number.

It is not a de Polignac number, because 538333421 - 2¹⁸ = 538071277 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 (538333021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269166710 + 269166711.

It is an arithmetic number, because the mean of its divisors is an integer number (269166711).

Almost surely, 2^538333421 is an apocalyptic number.

It is an amenable number.

538333421 is a deficient number, since it is larger than the sum of its proper divisors (1).

538333421 is an equidigital number, since it uses as much as digits as its factorization.

538333421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 32.

The square root of 538333421 is about 23202.0132962638. The cubic root of 538333421 is about 813.4866825239.

The spelling of 538333421 in words is "five hundred thirty-eight million, three hundred thirty-three thousand, four hundred twenty-one".