537575821 has 2 divisors, whose sum is σ = 537575822. Its totient is φ = 537575820.

The previous prime is 537575789. The next prime is 537575947. The reversal of 537575821 is 128575735.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 437855625 + 99720196 = 20925^2 + 9986^2 .

It is a cyclic number.

It is not a de Polignac number, because 537575821 - 2⁵ = 537575789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (537575221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 268787910 + 268787911.

It is an arithmetic number, because the mean of its divisors is an integer number (268787911).

Almost surely, 2^537575821 is an apocalyptic number.

It is an amenable number.

537575821 is a deficient number, since it is larger than the sum of its proper divisors (1).

537575821 is an equidigital number, since it uses as much as digits as its factorization.

537575821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 294000, while the sum is 43.

The square root of 537575821 is about 23185.6813788165. The cubic root of 537575821 is about 813.1048950670.

The spelling of 537575821 in words is "five hundred thirty-seven million, five hundred seventy-five thousand, eight hundred twenty-one".