161807071 has 8 divisors (see below), whose sum is σ = 171446544. Its totient is φ = 152181120.

The previous prime is 161807069. The next prime is 161807117. The reversal of 161807071 is 170708161.

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

It is a cyclic number.

It is not a de Polignac number, because 161807071 - 2¹ = 161807069 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 (161801071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31821 + ... + 36553.

It is an arithmetic number, because the mean of its divisors is an integer number (21430818).

Almost surely, 2^161807071 is an apocalyptic number.

161807071 is a deficient number, since it is larger than the sum of its proper divisors (9639473).

161807071 is a wasteful number, since it uses less digits than its factorization.

161807071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6761.

The product of its (nonzero) digits is 2352, while the sum is 31.

The square root of 161807071 is about 12720.3408366286. The cubic root of 161807071 is about 544.9196874052.

The spelling of 161807071 in words is "one hundred sixty-one million, eight hundred seven thousand, seventy-one".