791556197 has 2 divisors, whose sum is σ = 791556198. Its totient is φ = 791556196.

The previous prime is 791556179. The next prime is 791556217. The reversal of 791556197 is 791655197.

791556197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (791556179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 775121281 + 16434916 = 27841^2 + 4054^2 .

It is a cyclic number.

It is not a de Polignac number, because 791556197 - 2¹² = 791552101 is a prime.

It is a super-2 number, since 2×791556197² = 1253122426018205618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (791556107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 395778098 + 395778099.

It is an arithmetic number, because the mean of its divisors is an integer number (395778099).

Almost surely, 2^791556197 is an apocalyptic number.

It is an amenable number.

791556197 is a deficient number, since it is larger than the sum of its proper divisors (1).

791556197 is an equidigital number, since it uses as much as digits as its factorization.

791556197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 595350, while the sum is 50.

The square root of 791556197 is about 28134.6085275768. The cubic root of 791556197 is about 925.0401529198.

The spelling of 791556197 in words is "seven hundred ninety-one million, five hundred fifty-six thousand, one hundred ninety-seven".