63433661 has 2 divisors, whose sum is σ = 63433662. Its totient is φ = 63433660.

The previous prime is 63433639. The next prime is 63433693. The reversal of 63433661 is 16633436.

It is an a-pointer prime, because the next prime (63433693) can be obtained adding 63433661 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62900761 + 532900 = 7931^2 + 730^2 .

It is a cyclic number.

It is not a de Polignac number, because 63433661 - 2¹⁸ = 63171517 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63433631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31716830 + 31716831.

It is an arithmetic number, because the mean of its divisors is an integer number (31716831).

Almost surely, 2^63433661 is an apocalyptic number.

It is an amenable number.

63433661 is a deficient number, since it is larger than the sum of its proper divisors (1).

63433661 is an equidigital number, since it uses as much as digits as its factorization.

63433661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 32.

The square root of 63433661 is about 7964.5251584762. The cubic root of 63433661 is about 398.8166296221.

The spelling of 63433661 in words is "sixty-three million, four hundred thirty-three thousand, six hundred sixty-one".