161300403 has 80 divisors (see below), whose sum is σ = 291050496. Its totient is φ = 87816960.

The previous prime is 161300393. The next prime is 161300411. The reversal of 161300403 is 304003161.

It is not a de Polignac number, because 161300403 - 2⁵ = 161300371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161300413) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 348150 + ... + 348612.

Almost surely, 2^161300403 is an apocalyptic number.

161300403 is a deficient number, since it is larger than the sum of its proper divisors (129750093).

161300403 is a wasteful number, since it uses less digits than its factorization.

161300403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526 (or 517 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 161300403 is about 12700.4095603252. The cubic root of 161300403 is about 544.3503219942.

Adding to 161300403 its reverse (304003161), we get a palindrome (465303564).

The spelling of 161300403 in words is "one hundred sixty-one million, three hundred thousand, four hundred three".