63650921 has 2 divisors, whose sum is σ = 63650922. Its totient is φ = 63650920.

The previous prime is 63650891. The next prime is 63650927. The reversal of 63650921 is 12905636.

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., 63425296 + 225625 = 7964^2 + 475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63650921 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (63650927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31825460 + 31825461.

It is an arithmetic number, because the mean of its divisors is an integer number (31825461).

Almost surely, 2^63650921 is an apocalyptic number.

It is an amenable number.

63650921 is a deficient number, since it is larger than the sum of its proper divisors (1).

63650921 is an equidigital number, since it uses as much as digits as its factorization.

63650921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 63650921 is about 7978.1527310525. The cubic root of 63650921 is about 399.2714258383.

The spelling of 63650921 in words is "sixty-three million, six hundred fifty thousand, nine hundred twenty-one".