797666893 has 4 divisors (see below), whose sum is σ = 797744700. Its totient is φ = 797589088.

The previous prime is 797666869. The next prime is 797666897. The reversal of 797666893 is 398666797.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 788654889 + 9012004 = 28083^2 + 3002^2 .

It is a cyclic number.

It is not a de Polignac number, because 797666893 - 2²¹ = 795569741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (797666897) 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, 20680 + ... + 44977.

It is an arithmetic number, because the mean of its divisors is an integer number (199436175).

Almost surely, 2^797666893 is an apocalyptic number.

It is an amenable number.

797666893 is a deficient number, since it is larger than the sum of its proper divisors (77807).

797666893 is a wasteful number, since it uses less digits than its factorization.

797666893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77806.

The product of its digits is 20575296, while the sum is 61.

The square root of 797666893 is about 28242.9972382536. The cubic root of 797666893 is about 927.4144443912.

The spelling of 797666893 in words is "seven hundred ninety-seven million, six hundred sixty-six thousand, eight hundred ninety-three".