63322981 has 2 divisors, whose sum is σ = 63322982. Its totient is φ = 63322980.

The previous prime is 63322957. The next prime is 63322997. The reversal of 63322981 is 18922336.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58522500 + 4800481 = 7650^2 + 2191^2 .

It is a cyclic number.

It is not a de Polignac number, because 63322981 - 2⁵ = 63322949 is a prime.

It is a super-2 number, since 2×63322981² = 8019599845452722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63322481) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31661490 + 31661491.

It is an arithmetic number, because the mean of its divisors is an integer number (31661491).

Almost surely, 2^63322981 is an apocalyptic number.

It is an amenable number.

63322981 is a deficient number, since it is larger than the sum of its proper divisors (1).

63322981 is an equidigital number, since it uses as much as digits as its factorization.

63322981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 34.

The square root of 63322981 is about 7957.5738136696. The cubic root of 63322981 is about 398.5845408466.

The spelling of 63322981 in words is "sixty-three million, three hundred twenty-two thousand, nine hundred eighty-one".