161003073 has 48 divisors (see below), whose sum is σ = 288494784. Its totient is φ = 78704640.

The previous prime is 161003071. The next prime is 161003081. The reversal of 161003073 is 370300161.

It is not a de Polignac number, because 161003073 - 2¹ = 161003071 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (161003071) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24561 + ... + 30417.

It is an arithmetic number, because the mean of its divisors is an integer number (6010308).

Almost surely, 2^161003073 is an apocalyptic number.

It is an amenable number.

161003073 is a deficient number, since it is larger than the sum of its proper divisors (127491711).

161003073 is a wasteful number, since it uses less digits than its factorization.

161003073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5902 (or 5895 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 21.

The square root of 161003073 is about 12688.6986330356. The cubic root of 161003073 is about 544.0156436984.

The spelling of 161003073 in words is "one hundred sixty-one million, three thousand, seventy-three".