60812821 has 2 divisors, whose sum is σ = 60812822. Its totient is φ = 60812820.

The previous prime is 60812819. The next prime is 60812839. The reversal of 60812821 is 12821806.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37638225 + 23174596 = 6135^2 + 4814^2 .

It is a cyclic number.

It is not a de Polignac number, because 60812821 - 2¹ = 60812819 is a prime.

Together with 60812819, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 60812821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (60812891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30406410 + 30406411.

It is an arithmetic number, because the mean of its divisors is an integer number (30406411).

Almost surely, 2^60812821 is an apocalyptic number.

It is an amenable number.

60812821 is a deficient number, since it is larger than the sum of its proper divisors (1).

60812821 is an equidigital number, since it uses as much as digits as its factorization.

60812821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 60812821 is about 7798.2575617890. The cubic root of 60812821 is about 393.2466666438.

The spelling of 60812821 in words is "sixty million, eight hundred twelve thousand, eight hundred twenty-one".