16722129 has 4 divisors (see below), whose sum is σ = 22296176. Its totient is φ = 11148084.

The previous prime is 16722103. The next prime is 16722149. The reversal of 16722129 is 92122761.

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, and also an emirpimes, since its reverse is a distinct semiprime: 92122761 = 3 ⋅30707587.

It is not a de Polignac number, because 16722129 - 2¹⁶ = 16656593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16722096 and 16722105.

It is not an unprimeable number, because it can be changed into a prime (16722149) 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, 2787019 + ... + 2787024.

It is an arithmetic number, because the mean of its divisors is an integer number (5574044).

Almost surely, 2^16722129 is an apocalyptic number.

It is an amenable number.

16722129 is a deficient number, since it is larger than the sum of its proper divisors (5574047).

16722129 is an equidigital number, since it uses as much as digits as its factorization.

16722129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5574046.

The product of its digits is 3024, while the sum is 30.

The square root of 16722129 is about 4089.2699837502. The cubic root of 16722129 is about 255.7195058092.

The spelling of 16722129 in words is "sixteen million, seven hundred twenty-two thousand, one hundred twenty-nine".