163591797 has 4 divisors (see below), whose sum is σ = 218122400. Its totient is φ = 109061196.

The previous prime is 163591793. The next prime is 163591807. The reversal of 163591797 is 797195361.

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 not a de Polignac number, because 163591797 - 2² = 163591793 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 (163591793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27265297 + ... + 27265302.

It is an arithmetic number, because the mean of its divisors is an integer number (54530600).

Almost surely, 2^163591797 is an apocalyptic number.

It is an amenable number.

163591797 is a deficient number, since it is larger than the sum of its proper divisors (54530603).

163591797 is an equidigital number, since it uses as much as digits as its factorization.

163591797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54530602.

The product of its digits is 357210, while the sum is 48.

The square root of 163591797 is about 12790.3008956005. The cubic root of 163591797 is about 546.9158474284.

The spelling of 163591797 in words is "one hundred sixty-three million, five hundred ninety-one thousand, seven hundred ninety-seven".