7271999797 has 2 divisors, whose sum is σ = 7271999798. Its totient is φ = 7271999796.

The previous prime is 7271999731. The next prime is 7271999821. The reversal of 7271999797 is 7979991727.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6204082756 + 1067917041 = 78766^2 + 32679^2 .

It is an emirp because it is prime and its reverse (7979991727) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7271999797 - 2¹⁹ = 7271475509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7271999897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3635999898 + 3635999899.

It is an arithmetic number, because the mean of its divisors is an integer number (3635999899).

Almost surely, 2^7271999797 is an apocalyptic number.

It is an amenable number.

7271999797 is a deficient number, since it is larger than the sum of its proper divisors (1).

7271999797 is an equidigital number, since it uses as much as digits as its factorization.

7271999797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31505922, while the sum is 67.

The square root of 7271999797 is about 85276.0212310589. The cubic root of 7271999797 is about 1937.3940101687.

The spelling of 7271999797 in words is "seven billion, two hundred seventy-one million, nine hundred ninety-nine thousand, seven hundred ninety-seven".