161057447 has 4 divisors (see below), whose sum is σ = 161084880. Its totient is φ = 161030016.

The previous prime is 161057437. The next prime is 161057453. The reversal of 161057447 is 744750161.

It is a happy number.

161057447 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161057447 - 2⁸ = 161057191 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 (161057417) 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, 947 + ... + 17972.

It is an arithmetic number, because the mean of its divisors is an integer number (40271220).

Almost surely, 2^161057447 is an apocalyptic number.

161057447 is a deficient number, since it is larger than the sum of its proper divisors (27433).

161057447 is an equidigital number, since it uses as much as digits as its factorization.

161057447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27432.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 161057447 is about 12690.8410674785. The cubic root of 161057447 is about 544.0768785074.

The spelling of 161057447 in words is "one hundred sixty-one million, fifty-seven thousand, four hundred forty-seven".