797873149 has 2 divisors, whose sum is σ = 797873150. Its totient is φ = 797873148.

The previous prime is 797873147. The next prime is 797873173. The reversal of 797873149 is 941378797.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 635947524 + 161925625 = 25218^2 + 12725^2 .

It is a cyclic number.

It is not a de Polignac number, because 797873149 - 2¹ = 797873147 is a prime.

Together with 797873147, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 797873149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (797873147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 398936574 + 398936575.

It is an arithmetic number, because the mean of its divisors is an integer number (398936575).

Almost surely, 2^797873149 is an apocalyptic number.

It is an amenable number.

797873149 is a deficient number, since it is larger than the sum of its proper divisors (1).

797873149 is an equidigital number, since it uses as much as digits as its factorization.

797873149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2667168, while the sum is 55.

The square root of 797873149 is about 28246.6484560558. The cubic root of 797873149 is about 927.4943726213.

The spelling of 797873149 in words is "seven hundred ninety-seven million, eight hundred seventy-three thousand, one hundred forty-nine".