797163509 has 4 divisors (see below), whose sum is σ = 831822816. Its totient is φ = 762504204.

The previous prime is 797163491. The next prime is 797163511. The reversal of 797163509 is 905361797.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 797163509 - 2²⁴ = 780386293 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (797163709) 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, 17329619 + ... + 17329664.

It is an arithmetic number, because the mean of its divisors is an integer number (207955704).

Almost surely, 2^797163509 is an apocalyptic number.

It is an amenable number.

797163509 is a deficient number, since it is larger than the sum of its proper divisors (34659307).

797163509 is a wasteful number, since it uses less digits than its factorization.

797163509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34659306.

The product of its (nonzero) digits is 357210, while the sum is 47.

The square root of 797163509 is about 28234.0841714407. The cubic root of 797163509 is about 927.2193153904.

The spelling of 797163509 in words is "seven hundred ninety-seven million, one hundred sixty-three thousand, five hundred nine".