8459474921 has 2 divisors, whose sum is σ = 8459474922. Its totient is φ = 8459474920.

The previous prime is 8459474893. The next prime is 8459474939. The reversal of 8459474921 is 1294749548.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6978764521 + 1480710400 = 83539^2 + 38480^2 .

It is a cyclic number.

It is not a de Polignac number, because 8459474921 - 2¹⁸ = 8459212777 is a prime.

It is not a weakly prime, because it can be changed into another prime (8459474971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4229737460 + 4229737461.

It is an arithmetic number, because the mean of its divisors is an integer number (4229737461).

Almost surely, 2^8459474921 is an apocalyptic number.

It is an amenable number.

8459474921 is a deficient number, since it is larger than the sum of its proper divisors (1).

8459474921 is an equidigital number, since it uses as much as digits as its factorization.

8459474921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2903040, while the sum is 53.

The square root of 8459474921 is about 91975.4038914752. The cubic root of 8459474921 is about 2037.5790614359.

The spelling of 8459474921 in words is "eight billion, four hundred fifty-nine million, four hundred seventy-four thousand, nine hundred twenty-one".