163191957 has 8 divisors (see below), whose sum is σ = 217648320. Its totient is φ = 108765120.

The previous prime is 163191949. The next prime is 163191971. The reversal of 163191957 is 759191361.

163191957 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 not a de Polignac number, because 163191957 - 2³ = 163191949 is a prime.

It is a super-2 number, since 2×163191957² = 53263229658979698, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163191907) 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, 17544 + ... + 25182.

It is an arithmetic number, because the mean of its divisors is an integer number (27206040).

Almost surely, 2^163191957 is an apocalyptic number.

It is an amenable number.

163191957 is a deficient number, since it is larger than the sum of its proper divisors (54456363).

163191957 is an equidigital number, since it uses as much as digits as its factorization.

163191957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14763.

The product of its digits is 51030, while the sum is 42.

The square root of 163191957 is about 12774.6607391351. The cubic root of 163191957 is about 546.4699056824.

The spelling of 163191957 in words is "one hundred sixty-three million, one hundred ninety-one thousand, nine hundred fifty-seven".