163680797 has 4 divisors (see below), whose sum is σ = 187063776. Its totient is φ = 140297820.

The previous prime is 163680779. The next prime is 163680817. The reversal of 163680797 is 797086361.

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 163680797 - 2²⁰ = 162632221 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 (163680707) 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, 11691479 + ... + 11691492.

It is an arithmetic number, because the mean of its divisors is an integer number (46765944).

Almost surely, 2^163680797 is an apocalyptic number.

It is an amenable number.

163680797 is a deficient number, since it is larger than the sum of its proper divisors (23382979).

163680797 is an equidigital number, since it uses as much as digits as its factorization.

163680797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23382978.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 163680797 is about 12793.7796213629. The cubic root of 163680797 is about 547.0150102774.

The spelling of 163680797 in words is "one hundred sixty-three million, six hundred eighty thousand, seven hundred ninety-seven".