16891345 has 8 divisors (see below), whose sum is σ = 20335464. Its totient is φ = 13469184.

The previous prime is 16891339. The next prime is 16891349. The reversal of 16891345 is 54319861.

It can be written as a sum of positive squares in 4 ways, for example, as 859329 + 16032016 = 927^2 + 4004^2 .

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 16891345 - 2³ = 16891337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16891349) 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, 3744 + ... + 6913.

It is an arithmetic number, because the mean of its divisors is an integer number (2541933).

Almost surely, 2^16891345 is an apocalyptic number.

It is an amenable number.

16891345 is a deficient number, since it is larger than the sum of its proper divisors (3444119).

16891345 is a wasteful number, since it uses less digits than its factorization.

16891345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10979.

The product of its digits is 25920, while the sum is 37.

The square root of 16891345 is about 4109.9081498252. The cubic root of 16891345 is about 256.5791787801.

The spelling of 16891345 in words is "sixteen million, eight hundred ninety-one thousand, three hundred forty-five".