5471956921 has 2 divisors, whose sum is σ = 5471956922. Its totient is φ = 5471956920.

The previous prime is 5471956859. The next prime is 5471956949. The reversal of 5471956921 is 1296591745.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5097960000 + 373996921 = 71400^2 + 19339^2 .

It is a cyclic number.

It is not a de Polignac number, because 5471956921 - 2⁷ = 5471956793 is a prime.

It is not a weakly prime, because it can be changed into another prime (5471956981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2735978460 + 2735978461.

It is an arithmetic number, because the mean of its divisors is an integer number (2735978461).

Almost surely, 2^5471956921 is an apocalyptic number.

It is an amenable number.

5471956921 is a deficient number, since it is larger than the sum of its proper divisors (1).

5471956921 is an equidigital number, since it uses as much as digits as its factorization.

5471956921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 680400, while the sum is 49.

The square root of 5471956921 is about 73972.6768543629. The cubic root of 5471956921 is about 1762.1689986597.

The spelling of 5471956921 in words is "five billion, four hundred seventy-one million, nine hundred fifty-six thousand, nine hundred twenty-one".