7853948821 has 2 divisors, whose sum is σ = 7853948822. Its totient is φ = 7853948820.

The previous prime is 7853948803. The next prime is 7853948827. The reversal of 7853948821 is 1288493587.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6915751921 + 938196900 = 83161^2 + 30630^2 .

It is a cyclic number.

It is not a de Polignac number, because 7853948821 - 2²⁵ = 7820394389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7853948827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3926974410 + 3926974411.

It is an arithmetic number, because the mean of its divisors is an integer number (3926974411).

Almost surely, 2^7853948821 is an apocalyptic number.

It is an amenable number.

7853948821 is a deficient number, since it is larger than the sum of its proper divisors (1).

7853948821 is an equidigital number, since it uses as much as digits as its factorization.

7853948821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3870720, while the sum is 55.

The square root of 7853948821 is about 88622.5074176984. The cubic root of 7853948821 is about 1987.7542421538.

The spelling of 7853948821 in words is "seven billion, eight hundred fifty-three million, nine hundred forty-eight thousand, eight hundred twenty-one".