797638349 has 2 divisors, whose sum is σ = 797638350. Its totient is φ = 797638348.

The previous prime is 797638319. The next prime is 797638399. The reversal of 797638349 is 943836797.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 636805225 + 160833124 = 25235^2 + 12682^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-797638349 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 797638294 and 797638303.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (797638319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 398819174 + 398819175.

It is an arithmetic number, because the mean of its divisors is an integer number (398819175).

Almost surely, 2^797638349 is an apocalyptic number.

It is an amenable number.

797638349 is a deficient number, since it is larger than the sum of its proper divisors (1).

797638349 is an equidigital number, since it uses as much as digits as its factorization.

797638349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6858432, while the sum is 56.

The square root of 797638349 is about 28242.4919049294. The cubic root of 797638349 is about 927.4033819482.

The spelling of 797638349 in words is "seven hundred ninety-seven million, six hundred thirty-eight thousand, three hundred forty-nine".