537701821 has 2 divisors, whose sum is σ = 537701822. Its totient is φ = 537701820.

The previous prime is 537701807. The next prime is 537701833. The reversal of 537701821 is 128107735.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 453264100 + 84437721 = 21290^2 + 9189^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-537701821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (537701861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 268850910 + 268850911.

It is an arithmetic number, because the mean of its divisors is an integer number (268850911).

Almost surely, 2^537701821 is an apocalyptic number.

It is an amenable number.

537701821 is a deficient number, since it is larger than the sum of its proper divisors (1).

537701821 is an equidigital number, since it uses as much as digits as its factorization.

537701821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 537701821 is about 23188.3984138620. The cubic root of 537701821 is about 813.1684167815.

The spelling of 537701821 in words is "five hundred thirty-seven million, seven hundred one thousand, eight hundred twenty-one".