797171921 has 8 divisors (see below), whose sum is σ = 981134784. Its totient is φ = 630729360.

The previous prime is 797171917. The next prime is 797171953. The reversal of 797171921 is 129171797.

797171921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 797171921 - 2² = 797171917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (797171971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4379975 + ... + 4380156.

It is an arithmetic number, because the mean of its divisors is an integer number (122641848).

Almost surely, 2^797171921 is an apocalyptic number.

It is an amenable number.

797171921 is a deficient number, since it is larger than the sum of its proper divisors (183962863).

797171921 is a wasteful number, since it uses less digits than its factorization.

797171921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8760151.

The product of its digits is 55566, while the sum is 44.

The square root of 797171921 is about 28234.2331399314. The cubic root of 797171921 is about 927.2225768466. Note that the first 3 decimals are identical.

The spelling of 797171921 in words is "seven hundred ninety-seven million, one hundred seventy-one thousand, nine hundred twenty-one".