161138071 has 8 divisors (see below), whose sum is σ = 169343504. Its totient is φ = 153135360.

The previous prime is 161138063. The next prime is 161138099. The reversal of 161138071 is 170831161.

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 161138071 - 2³ = 161138063 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 (161138011) 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, 49050 + ... + 52231.

It is an arithmetic number, because the mean of its divisors is an integer number (21167938).

Almost surely, 2^161138071 is an apocalyptic number.

161138071 is a deficient number, since it is larger than the sum of its proper divisors (8205433).

161138071 is a wasteful number, since it uses less digits than its factorization.

161138071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101361.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 161138071 is about 12694.0171340675. The cubic root of 161138071 is about 544.1676501286.

The spelling of 161138071 in words is "one hundred sixty-one million, one hundred thirty-eight thousand, seventy-one".