537845621 has 2 divisors, whose sum is σ = 537845622. Its totient is φ = 537845620.

The previous prime is 537845611. The next prime is 537845647. The reversal of 537845621 is 126548735.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 537590596 + 255025 = 23186^2 + 505^2 .

It is a cyclic number.

It is not a de Polignac number, because 537845621 - 2⁶ = 537845557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (537845611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 268922810 + 268922811.

It is an arithmetic number, because the mean of its divisors is an integer number (268922811).

Almost surely, 2^537845621 is an apocalyptic number.

It is an amenable number.

537845621 is a deficient number, since it is larger than the sum of its proper divisors (1).

537845621 is an equidigital number, since it uses as much as digits as its factorization.

537845621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 201600, while the sum is 41.

The square root of 537845621 is about 23191.4988950693. The cubic root of 537845621 is about 813.2409000744.

The spelling of 537845621 in words is "five hundred thirty-seven million, eight hundred forty-five thousand, six hundred twenty-one".