16812129 has 4 divisors (see below), whose sum is σ = 22416176. Its totient is φ = 11208084.

The previous prime is 16812127. The next prime is 16812139. The reversal of 16812129 is 92121861.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 16812129 - 2¹ = 16812127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16812096 and 16812105.

It is not an unprimeable number, because it can be changed into a prime (16812127) 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, 2802019 + ... + 2802024.

It is an arithmetic number, because the mean of its divisors is an integer number (5604044).

Almost surely, 2^16812129 is an apocalyptic number.

It is an amenable number.

16812129 is a deficient number, since it is larger than the sum of its proper divisors (5604047).

16812129 is an equidigital number, since it uses as much as digits as its factorization.

16812129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5604046.

The product of its digits is 1728, while the sum is 30.

The square root of 16812129 is about 4100.2596259261. The cubic root of 16812129 is about 256.1774536654.

The spelling of 16812129 in words is "sixteen million, eight hundred twelve thousand, one hundred twenty-nine".