821960533 has 2 divisors, whose sum is σ = 821960534. Its totient is φ = 821960532.

The previous prime is 821960527. The next prime is 821960561. The reversal of 821960533 is 335069128.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 706655889 + 115304644 = 26583^2 + 10738^2 .

It is a cyclic number.

It is not a de Polignac number, because 821960533 - 2²¹ = 819863381 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 821960492 and 821960501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (821960563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410980266 + 410980267.

It is an arithmetic number, because the mean of its divisors is an integer number (410980267).

Almost surely, 2^821960533 is an apocalyptic number.

It is an amenable number.

821960533 is a deficient number, since it is larger than the sum of its proper divisors (1).

821960533 is an equidigital number, since it uses as much as digits as its factorization.

821960533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 821960533 is about 28669.8540805495. The cubic root of 821960533 is about 936.7355196632.

The spelling of 821960533 in words is "eight hundred twenty-one million, nine hundred sixty thousand, five hundred thirty-three".