63021649 has 2 divisors, whose sum is σ = 63021650. Its totient is φ = 63021648.

The previous prime is 63021643. The next prime is 63021653. The reversal of 63021649 is 94612036.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58247424 + 4774225 = 7632^2 + 2185^2 .

It is a cyclic number.

It is not a de Polignac number, because 63021649 - 2⁷ = 63021521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63021649.

It is not a weakly prime, because it can be changed into another prime (63021643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31510824 + 31510825.

It is an arithmetic number, because the mean of its divisors is an integer number (31510825).

Almost surely, 2^63021649 is an apocalyptic number.

It is an amenable number.

63021649 is a deficient number, since it is larger than the sum of its proper divisors (1).

63021649 is an equidigital number, since it uses as much as digits as its factorization.

63021649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 63021649 is about 7938.6175748678. The cubic root of 63021649 is about 397.9512936702.

The spelling of 63021649 in words is "sixty-three million, twenty-one thousand, six hundred forty-nine".