16409345 has 8 divisors (see below), whose sum is σ = 20110464. Its totient is φ = 12847984.

The previous prime is 16409339. The next prime is 16409347. The reversal of 16409345 is 54390461.

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 16409345 - 2⁴ = 16409329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16409347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34679 + ... + 35148.

It is an arithmetic number, because the mean of its divisors is an integer number (2513808).

Almost surely, 2^16409345 is an apocalyptic number.

It is an amenable number.

16409345 is a deficient number, since it is larger than the sum of its proper divisors (3701119).

16409345 is an equidigital number, since it uses as much as digits as its factorization.

16409345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69879.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 16409345 is about 4050.8449735827. The cubic root of 16409345 is about 254.1150665951.

The spelling of 16409345 in words is "sixteen million, four hundred nine thousand, three hundred forty-five".