797717381 has 4 divisors (see below), whose sum is σ = 816268992. Its totient is φ = 779165772.

The previous prime is 797717369. The next prime is 797717383. The reversal of 797717381 is 183717797.

797717381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 183717797 = 2129 ⋅86293.

It is a cyclic number.

It is not a de Polignac number, because 797717381 - 2⁶ = 797717317 is a prime.

It is a super-2 number, since 2×797717381² = 1272706039898998322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (797717383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9275741 + ... + 9275826.

It is an arithmetic number, because the mean of its divisors is an integer number (204067248).

Almost surely, 2^797717381 is an apocalyptic number.

It is an amenable number.

797717381 is a deficient number, since it is larger than the sum of its proper divisors (18551611).

797717381 is a wasteful number, since it uses less digits than its factorization.

797717381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18551610.

The product of its digits is 518616, while the sum is 50.

The square root of 797717381 is about 28243.8910385945. The cubic root of 797717381 is about 927.4340107511.

The spelling of 797717381 in words is "seven hundred ninety-seven million, seven hundred seventeen thousand, three hundred eighty-one".