536657021 has 2 divisors, whose sum is σ = 536657022. Its totient is φ = 536657020.

The previous prime is 536656973. The next prime is 536657039. The reversal of 536657021 is 120756635.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 513520921 + 23136100 = 22661^2 + 4810^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-536657021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (536657041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 268328510 + 268328511.

It is an arithmetic number, because the mean of its divisors is an integer number (268328511).

Almost surely, 2^536657021 is an apocalyptic number.

It is an amenable number.

536657021 is a deficient number, since it is larger than the sum of its proper divisors (1).

536657021 is an equidigital number, since it uses as much as digits as its factorization.

536657021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 536657021 is about 23165.8589523462. The cubic root of 536657021 is about 812.6413903368.

The spelling of 536657021 in words is "five hundred thirty-six million, six hundred fifty-seven thousand, twenty-one".