16940609 has 8 divisors (see below), whose sum is σ = 20379840. Its totient is φ = 13756176.

The previous prime is 16940603. The next prime is 16940617. The reversal of 16940609 is 90604961.

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

It is not a de Polignac number, because 16940609 - 2⁴ = 16940593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16940603) 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, 63554 + ... + 63819.

It is an arithmetic number, because the mean of its divisors is an integer number (2547480).

Almost surely, 2^16940609 is an apocalyptic number.

16940609 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

16940609 is a deficient number, since it is larger than the sum of its proper divisors (3439231).

16940609 is a wasteful number, since it uses less digits than its factorization.

16940609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127399.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 16940609 is about 4115.8971075575. The cubic root of 16940609 is about 256.8283763847.

The spelling of 16940609 in words is "sixteen million, nine hundred forty thousand, six hundred nine".