63213961 has 2 divisors, whose sum is σ = 63213962. Its totient is φ = 63213960.

The previous prime is 63213949. The next prime is 63213971. The reversal of 63213961 is 16931236.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60217600 + 2996361 = 7760^2 + 1731^2 .

It is a cyclic number.

It is not a de Polignac number, because 63213961 - 2¹¹ = 63211913 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63213901) 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, 31606980 + 31606981.

It is an arithmetic number, because the mean of its divisors is an integer number (31606981).

Almost surely, 2^63213961 is an apocalyptic number.

It is an amenable number.

63213961 is a deficient number, since it is larger than the sum of its proper divisors (1).

63213961 is an equidigital number, since it uses as much as digits as its factorization.

63213961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 31.

The square root of 63213961 is about 7950.7207849352. The cubic root of 63213961 is about 398.3556684468.

The spelling of 63213961 in words is "sixty-three million, two hundred thirteen thousand, nine hundred sixty-one".