797610881 has 2 divisors, whose sum is σ = 797610882. Its totient is φ = 797610880.

The previous prime is 797610851. The next prime is 797610917. The reversal of 797610881 is 188016797.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 562448656 + 235162225 = 23716^2 + 15335^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-797610881 is a prime.

It is a super-2 number, since 2×797610881² = 1272366234979192322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (797610851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 398805440 + 398805441.

It is an arithmetic number, because the mean of its divisors is an integer number (398805441).

Almost surely, 2^797610881 is an apocalyptic number.

It is an amenable number.

797610881 is a deficient number, since it is larger than the sum of its proper divisors (1).

797610881 is an equidigital number, since it uses as much as digits as its factorization.

797610881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 47.

The square root of 797610881 is about 28242.0056122082. The cubic root of 797610881 is about 927.3927362679.

The spelling of 797610881 in words is "seven hundred ninety-seven million, six hundred ten thousand, eight hundred eighty-one".