161043949 has 16 divisors (see below), whose sum is σ = 181739520. Its totient is φ = 141438960.

The previous prime is 161043937. The next prime is 161043997. The reversal of 161043949 is 949340161.

It is a cyclic number.

It is not a de Polignac number, because 161043949 - 2⁵ = 161043917 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 (161043919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38872 + ... + 42814.

It is an arithmetic number, because the mean of its divisors is an integer number (11358720).

Almost surely, 2^161043949 is an apocalyptic number.

It is an amenable number.

161043949 is a deficient number, since it is larger than the sum of its proper divisors (20695571).

161043949 is a wasteful number, since it uses less digits than its factorization.

161043949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4080.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 161043949 is about 12690.3092554910. The cubic root of 161043949 is about 544.0616786414.

The spelling of 161043949 in words is "one hundred sixty-one million, forty-three thousand, nine hundred forty-nine".