797900681 has 2 divisors, whose sum is σ = 797900682. Its totient is φ = 797900680.

The previous prime is 797900651. The next prime is 797900683. The reversal of 797900681 is 186009797.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 564300025 + 233600656 = 23755^2 + 15284^2 .

It is a cyclic number.

It is not a de Polignac number, because 797900681 - 2¹⁸ = 797638537 is a prime.

It is a super-2 number, since 2×797900681² = 1273290993480527522, which contains 22 as substring.

Together with 797900683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (797900683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 398950340 + 398950341.

It is an arithmetic number, because the mean of its divisors is an integer number (398950341).

Almost surely, 2^797900681 is an apocalyptic number.

It is an amenable number.

797900681 is a deficient number, since it is larger than the sum of its proper divisors (1).

797900681 is an equidigital number, since it uses as much as digits as its factorization.

797900681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 47.

The square root of 797900681 is about 28247.1358017056. The cubic root of 797900681 is about 927.5050407671.

The spelling of 797900681 in words is "seven hundred ninety-seven million, nine hundred thousand, six hundred eighty-one".