63921019 has 2 divisors, whose sum is σ = 63921020. Its totient is φ = 63921018.

The previous prime is 63921001. The next prime is 63921029. The reversal of 63921019 is 91012936.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63921019 - 2¹¹ = 63918971 is a prime.

It is a super-2 number, since 2×63921019² = 8171793339996722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (63921029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31960509 + 31960510.

It is an arithmetic number, because the mean of its divisors is an integer number (31960510).

Almost surely, 2^63921019 is an apocalyptic number.

63921019 is a deficient number, since it is larger than the sum of its proper divisors (1).

63921019 is an equidigital number, since it uses as much as digits as its factorization.

63921019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 63921019 is about 7995.0621636107. The cubic root of 63921019 is about 399.8353885169.

The spelling of 63921019 in words is "sixty-three million, nine hundred twenty-one thousand, nineteen".