161184791 has 4 divisors (see below), whose sum is σ = 161211000. Its totient is φ = 161158584.

The previous prime is 161184787. The next prime is 161184797. The reversal of 161184791 is 197481161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 197481161 = 9629 ⋅20509.

It is a cyclic number.

It is not a de Polignac number, because 161184791 - 2² = 161184787 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 (161184797) 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, 1685 + ... + 18033.

It is an arithmetic number, because the mean of its divisors is an integer number (40302750).

Almost surely, 2^161184791 is an apocalyptic number.

161184791 is a deficient number, since it is larger than the sum of its proper divisors (26209).

161184791 is an equidigital number, since it uses as much as digits as its factorization.

161184791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26208.

The product of its digits is 12096, while the sum is 38.

The square root of 161184791 is about 12695.8572376977. The cubic root of 161184791 is about 544.2202366171.

The spelling of 161184791 in words is "one hundred sixty-one million, one hundred eighty-four thousand, seven hundred ninety-one".