63950891 has 2 divisors, whose sum is σ = 63950892. Its totient is φ = 63950890.

The previous prime is 63950801. The next prime is 63950921. The reversal of 63950891 is 19805936.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63950891 - 2¹⁸ = 63688747 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63950801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31975445 + 31975446.

It is an arithmetic number, because the mean of its divisors is an integer number (31975446).

Almost surely, 2^63950891 is an apocalyptic number.

63950891 is a deficient number, since it is larger than the sum of its proper divisors (1).

63950891 is an equidigital number, since it uses as much as digits as its factorization.

63950891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 63950891 is about 7996.9300984815. The cubic root of 63950891 is about 399.8976634036.

The spelling of 63950891 in words is "sixty-three million, nine hundred fifty thousand, eight hundred ninety-one".