9453479821 has 2 divisors, whose sum is σ = 9453479822. Its totient is φ = 9453479820.

The previous prime is 9453479809. The next prime is 9453479831. The reversal of 9453479821 is 1289743549.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8795813796 + 657666025 = 93786^2 + 25645^2 .

It is a cyclic number.

It is not a de Polignac number, because 9453479821 - 2⁹ = 9453479309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9453479831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4726739910 + 4726739911.

It is an arithmetic number, because the mean of its divisors is an integer number (4726739911).

Almost surely, 2^9453479821 is an apocalyptic number.

It is an amenable number.

9453479821 is a deficient number, since it is larger than the sum of its proper divisors (1).

9453479821 is an equidigital number, since it uses as much as digits as its factorization.

9453479821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 52.

The square root of 9453479821 is about 97229.0070966479. The cubic root of 9453479821 is about 2114.4490939964.

The spelling of 9453479821 in words is "nine billion, four hundred fifty-three million, four hundred seventy-nine thousand, eight hundred twenty-one".