16129009 has 8 divisors (see below), whose sum is σ = 17442432. Its totient is φ = 14826000.

The previous prime is 16128989. The next prime is 16129067. The reversal of 16129009 is 90092161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16129009 - 2¹¹ = 16126961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16129109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 792 + ... + 5734.

It is an arithmetic number, because the mean of its divisors is an integer number (2180304).

Almost surely, 2^16129009 is an apocalyptic number.

It is an amenable number.

16129009 is a deficient number, since it is larger than the sum of its proper divisors (1313423).

16129009 is a wasteful number, since it uses less digits than its factorization.

16129009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5207.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 16129009 is about 4016.0937489058. The cubic root of 16129009 is about 252.6596526512.

It can be divided in two parts, 1612900 and 9, that multiplied together give a square (14516100 = 3810²).

The spelling of 16129009 in words is "sixteen million, one hundred twenty-nine thousand, nine".