16929905 has 8 divisors (see below), whose sum is σ = 20865192. Its totient is φ = 13177728.

The previous prime is 16929901. The next prime is 16929911. The reversal of 16929905 is 50992961.

It can be written as a sum of positive squares in 4 ways, for example, as 1216609 + 15713296 = 1103^2 + 3964^2 .

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 16929905 - 2² = 16929901 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16929901) 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, 45572 + ... + 45941.

It is an arithmetic number, because the mean of its divisors is an integer number (2608149).

Almost surely, 2^16929905 is an apocalyptic number.

It is an amenable number.

16929905 is a deficient number, since it is larger than the sum of its proper divisors (3935287).

16929905 is an equidigital number, since it uses as much as digits as its factorization.

16929905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91555.

The product of its (nonzero) digits is 43740, while the sum is 41.

The square root of 16929905 is about 4114.5965780378. The cubic root of 16929905 is about 256.7742722662.

The spelling of 16929905 in words is "sixteen million, nine hundred twenty-nine thousand, nine hundred five".