797226581 has 2 divisors, whose sum is σ = 797226582. Its totient is φ = 797226580.

The previous prime is 797226557. The next prime is 797226589. The reversal of 797226581 is 185622797.

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., 784560100 + 12666481 = 28010^2 + 3559^2 .

It is an emirp because it is prime and its reverse (185622797) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-797226581 is a prime.

It is a super-2 number, since 2×797226581² = 1271140442905899122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (797226589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 398613290 + 398613291.

It is an arithmetic number, because the mean of its divisors is an integer number (398613291).

Almost surely, 2^797226581 is an apocalyptic number.

It is an amenable number.

797226581 is a deficient number, since it is larger than the sum of its proper divisors (1).

797226581 is an equidigital number, since it uses as much as digits as its factorization.

797226581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 423360, while the sum is 47.

The square root of 797226581 is about 28235.2010972120. The cubic root of 797226581 is about 927.2437687737.

The spelling of 797226581 in words is "seven hundred ninety-seven million, two hundred twenty-six thousand, five hundred eighty-one".