8921807963 has 2 divisors, whose sum is σ = 8921807964. Its totient is φ = 8921807962.

The previous prime is 8921807959. The next prime is 8921807977. The reversal of 8921807963 is 3697081298.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8921807963 - 2² = 8921807959 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (8921807953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4460903981 + 4460903982.

It is an arithmetic number, because the mean of its divisors is an integer number (4460903982).

Almost surely, 2^8921807963 is an apocalyptic number.

8921807963 is a deficient number, since it is larger than the sum of its proper divisors (1).

8921807963 is an equidigital number, since it uses as much as digits as its factorization.

8921807963 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The square root of 8921807963 is about 94455.3225763376. The cubic root of 8921807963 is about 2074.0423674596.

The spelling of 8921807963 in words is "eight billion, nine hundred twenty-one million, eight hundred seven thousand, nine hundred sixty-three".