63211913 has 2 divisors, whose sum is σ = 63211914. Its totient is φ = 63211912.

The previous prime is 63211903. The next prime is 63211919. The reversal of 63211913 is 31911236.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63170704 + 41209 = 7948^2 + 203^2 .

It is a cyclic number.

It is not a de Polignac number, because 63211913 - 2⁸ = 63211657 is a prime.

It is not a weakly prime, because it can be changed into another prime (63211919) 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, 31605956 + 31605957.

It is an arithmetic number, because the mean of its divisors is an integer number (31605957).

Almost surely, 2^63211913 is an apocalyptic number.

It is an amenable number.

63211913 is a deficient number, since it is larger than the sum of its proper divisors (1).

63211913 is an equidigital number, since it uses as much as digits as its factorization.

63211913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972, while the sum is 26.

The square root of 63211913 is about 7950.5919905376. The cubic root of 63211913 is about 398.3513664371.

The spelling of 63211913 in words is "sixty-three million, two hundred eleven thousand, nine hundred thirteen".