63910321 has 2 divisors, whose sum is σ = 63910322. Its totient is φ = 63910320.

The previous prime is 63910309. The next prime is 63910331. The reversal of 63910321 is 12301936.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60528400 + 3381921 = 7780^2 + 1839^2 .

It is a cyclic number.

It is not a de Polignac number, because 63910321 - 2⁹ = 63909809 is a prime.

It is not a weakly prime, because it can be changed into another prime (63910331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31955160 + 31955161.

It is an arithmetic number, because the mean of its divisors is an integer number (31955161).

Almost surely, 2^63910321 is an apocalyptic number.

It is an amenable number.

63910321 is a deficient number, since it is larger than the sum of its proper divisors (1).

63910321 is an equidigital number, since it uses as much as digits as its factorization.

63910321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 63910321 is about 7994.3930976654. The cubic root of 63910321 is about 399.8130814172.

The spelling of 63910321 in words is "sixty-three million, nine hundred ten thousand, three hundred twenty-one".