538433557 has 2 divisors, whose sum is σ = 538433558. Its totient is φ = 538433556.

The previous prime is 538433479. The next prime is 538433563. The reversal of 538433557 is 755334835.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 515017636 + 23415921 = 22694^2 + 4839^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-538433557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (538433957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269216778 + 269216779.

It is an arithmetic number, because the mean of its divisors is an integer number (269216779).

Almost surely, 2^538433557 is an apocalyptic number.

It is an amenable number.

538433557 is a deficient number, since it is larger than the sum of its proper divisors (1).

538433557 is an equidigital number, since it uses as much as digits as its factorization.

538433557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756000, while the sum is 43.

The square root of 538433557 is about 23204.1711121083. The cubic root of 538433557 is about 813.5371185852.

The spelling of 538433557 in words is "five hundred thirty-eight million, four hundred thirty-three thousand, five hundred fifty-seven".