163371961 has 4 divisors (see below), whose sum is σ = 163400832. Its totient is φ = 163343092.

The previous prime is 163371947. The next prime is 163371977. The reversal of 163371961 is 169173361.

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 163371961 - 2⁷ = 163371833 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 163371961.

It is not an unprimeable number, because it can be changed into a prime (163371931) 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, 2845 + ... + 18298.

It is an arithmetic number, because the mean of its divisors is an integer number (40850208).

Almost surely, 2^163371961 is an apocalyptic number.

It is an amenable number.

163371961 is a deficient number, since it is larger than the sum of its proper divisors (28871).

163371961 is an equidigital number, since it uses as much as digits as its factorization.

163371961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28870.

The product of its digits is 20412, while the sum is 37.

The square root of 163371961 is about 12781.7041508556. The cubic root of 163371961 is about 546.6707542741.

The spelling of 163371961 in words is "one hundred sixty-three million, three hundred seventy-one thousand, nine hundred sixty-one".