161673547 has 4 divisors (see below), whose sum is σ = 184769776. Its totient is φ = 138577320.

The previous prime is 161673529. The next prime is 161673559. The reversal of 161673547 is 745376161.

161673547 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 not a de Polignac number, because 161673547 - 2¹⁵ = 161640779 is a prime.

It is a super-2 number, since 2×161673547² = 52276671599122418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161673047) 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, 11548104 + ... + 11548117.

It is an arithmetic number, because the mean of its divisors is an integer number (46192444).

Almost surely, 2^161673547 is an apocalyptic number.

161673547 is a deficient number, since it is larger than the sum of its proper divisors (23096229).

161673547 is an equidigital number, since it uses as much as digits as its factorization.

161673547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23096228.

The product of its digits is 105840, while the sum is 40.

The square root of 161673547 is about 12715.0913091491. The cubic root of 161673547 is about 544.7697560106.

The spelling of 161673547 in words is "one hundred sixty-one million, six hundred seventy-three thousand, five hundred forty-seven".