797638577 has 2 divisors, whose sum is σ = 797638578. Its totient is φ = 797638576.

The previous prime is 797638561. The next prime is 797638579. The reversal of 797638577 is 775836797.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 786017296 + 11621281 = 28036^2 + 3409^2 .

It is a cyclic number.

It is not a de Polignac number, because 797638577 - 2⁴ = 797638561 is a prime.

Together with 797638579, 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 (797638579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 398819288 + 398819289.

It is an arithmetic number, because the mean of its divisors is an integer number (398819289).

Almost surely, 2^797638577 is an apocalyptic number.

It is an amenable number.

797638577 is a deficient number, since it is larger than the sum of its proper divisors (1).

797638577 is an equidigital number, since it uses as much as digits as its factorization.

797638577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15558480, while the sum is 59.

The square root of 797638577 is about 28242.4959414001. The cubic root of 797638577 is about 927.4034703123.

The spelling of 797638577 in words is "seven hundred ninety-seven million, six hundred thirty-eight thousand, five hundred seventy-seven".