161189167 has 4 divisors (see below), whose sum is σ = 161881200. Its totient is φ = 160497136.

The previous prime is 161189137. The next prime is 161189173. The reversal of 161189167 is 761981161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 761981161 = 21247 ⋅35863.

It is a cyclic number.

It is not a de Polignac number, because 161189167 - 2¹¹ = 161187119 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 (161189107) 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, 345667 + ... + 346132.

It is an arithmetic number, because the mean of its divisors is an integer number (40470300).

Almost surely, 2^161189167 is an apocalyptic number.

161189167 is a deficient number, since it is larger than the sum of its proper divisors (692033).

161189167 is an equidigital number, since it uses as much as digits as its factorization.

161189167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692032.

The product of its digits is 18144, while the sum is 40.

The square root of 161189167 is about 12696.0295762100. The cubic root of 161189167 is about 544.2251615776.

The spelling of 161189167 in words is "one hundred sixty-one million, one hundred eighty-nine thousand, one hundred sixty-seven".