63650891 has 2 divisors, whose sum is σ = 63650892. Its totient is φ = 63650890.

The previous prime is 63650849. The next prime is 63650921. The reversal of 63650891 is 19805636.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63650891 - 2¹⁴ = 63634507 is a prime.

It is not a weakly prime, because it can be changed into another prime (63650291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31825445 + 31825446.

It is an arithmetic number, because the mean of its divisors is an integer number (31825446).

Almost surely, 2^63650891 is an apocalyptic number.

63650891 is a deficient number, since it is larger than the sum of its proper divisors (1).

63650891 is an equidigital number, since it uses as much as digits as its factorization.

63650891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 63650891 is about 7978.1508509178. The cubic root of 63650891 is about 399.2713631100.

The spelling of 63650891 in words is "sixty-three million, six hundred fifty thousand, eight hundred ninety-one".