63221969 has 2 divisors, whose sum is σ = 63221970. Its totient is φ = 63221968.

The previous prime is 63221957. The next prime is 63221999. The reversal of 63221969 is 96912236.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52417600 + 10804369 = 7240^2 + 3287^2 .

It is a cyclic number.

It is not a de Polignac number, because 63221969 - 2¹² = 63217873 is a prime.

It is a super-2 number, since 2×63221969² = 7994034728473922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (63221999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31610984 + 31610985.

It is an arithmetic number, because the mean of its divisors is an integer number (31610985).

Almost surely, 2^63221969 is an apocalyptic number.

It is an amenable number.

63221969 is a deficient number, since it is larger than the sum of its proper divisors (1).

63221969 is an equidigital number, since it uses as much as digits as its factorization.

63221969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 38.

The square root of 63221969 is about 7951.2243711268. The cubic root of 63221969 is about 398.3724890850.

The spelling of 63221969 in words is "sixty-three million, two hundred twenty-one thousand, nine hundred sixty-nine".