9575072821 has 2 divisors, whose sum is σ = 9575072822. Its totient is φ = 9575072820.

The previous prime is 9575072807. The next prime is 9575072849. The reversal of 9575072821 is 1282705759.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9570708900 + 4363921 = 97830^2 + 2089^2 .

It is a cyclic number.

It is not a de Polignac number, because 9575072821 - 2¹¹ = 9575070773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9575073821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4787536410 + 4787536411.

It is an arithmetic number, because the mean of its divisors is an integer number (4787536411).

Almost surely, 2^9575072821 is an apocalyptic number.

It is an amenable number.

9575072821 is a deficient number, since it is larger than the sum of its proper divisors (1).

9575072821 is an equidigital number, since it uses as much as digits as its factorization.

9575072821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 352800, while the sum is 46.

The square root of 9575072821 is about 97852.3010511250. The cubic root of 9575072821 is about 2123.4760244405.

The spelling of 9575072821 in words is "nine billion, five hundred seventy-five million, seventy-two thousand, eight hundred twenty-one".