161478971 has 8 divisors (see below), whose sum is σ = 172639584. Its totient is φ = 150503040.

The previous prime is 161478959. The next prime is 161478991. The reversal of 161478971 is 179874161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161478971 - 2¹⁸ = 161216827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161478991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44360 + ... + 47861.

It is an arithmetic number, because the mean of its divisors is an integer number (21579948).

Almost surely, 2^161478971 is an apocalyptic number.

161478971 is a deficient number, since it is larger than the sum of its proper divisors (11160613).

161478971 is a wasteful number, since it uses less digits than its factorization.

161478971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92341.

The product of its digits is 84672, while the sum is 44.

The square root of 161478971 is about 12707.4376252650. The cubic root of 161478971 is about 544.5511226922.

The spelling of 161478971 in words is "one hundred sixty-one million, four hundred seventy-eight thousand, nine hundred seventy-one".