161729003 has 4 divisors (see below), whose sum is σ = 162800208. Its totient is φ = 160657800.

The previous prime is 161728993. The next prime is 161729093. The reversal of 161729003 is 300927161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 300927161 = 181 ⋅1662581.

It is a cyclic number.

It is not a de Polignac number, because 161729003 - 2⁸ = 161728747 is a prime.

It is a super-2 number, since 2×161729003² = 52312540822748018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161729093) 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, 535376 + ... + 535677.

It is an arithmetic number, because the mean of its divisors is an integer number (40700052).

Almost surely, 2^161729003 is an apocalyptic number.

161729003 is a deficient number, since it is larger than the sum of its proper divisors (1071205).

161729003 is a wasteful number, since it uses less digits than its factorization.

161729003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071204.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 161729003 is about 12717.2718379376. The cubic root of 161729003 is about 544.8320364487.

The spelling of 161729003 in words is "one hundred sixty-one million, seven hundred twenty-nine thousand, three".