9464490821 has 2 divisors, whose sum is σ = 9464490822. Its totient is φ = 9464490820.

The previous prime is 9464490803. The next prime is 9464490829. The reversal of 9464490821 is 1280944649.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7247116900 + 2217373921 = 85130^2 + 47089^2 .

It is a cyclic number.

It is not a de Polignac number, because 9464490821 - 2⁶ = 9464490757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9464490829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4732245410 + 4732245411.

It is an arithmetic number, because the mean of its divisors is an integer number (4732245411).

Almost surely, 2^9464490821 is an apocalyptic number.

It is an amenable number.

9464490821 is a deficient number, since it is larger than the sum of its proper divisors (1).

9464490821 is an equidigital number, since it uses as much as digits as its factorization.

9464490821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 497664, while the sum is 47.

The square root of 9464490821 is about 97285.6146663010. The cubic root of 9464490821 is about 2115.2697147589.

The spelling of 9464490821 in words is "nine billion, four hundred sixty-four million, four hundred ninety thousand, eight hundred twenty-one".