16940709 has 12 divisors (see below), whose sum is σ = 25131756. Its totient is φ = 10988352.

The previous prime is 16940701. The next prime is 16940711. The reversal of 16940709 is 90704961.

It can be written as a sum of positive squares in 2 ways, for example, as 12852225 + 4088484 = 3585^2 + 2022^2 .

It is not a de Polignac number, because 16940709 - 2³ = 16940701 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16940701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25104 + ... + 25769.

It is an arithmetic number, because the mean of its divisors is an integer number (2094313).

Almost surely, 2^16940709 is an apocalyptic number.

It is an amenable number.

16940709 is a deficient number, since it is larger than the sum of its proper divisors (8191047).

16940709 is a wasteful number, since it uses less digits than its factorization.

16940709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50916 (or 50913 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 16940709 is about 4115.9092555595. The cubic root of 16940709 is about 256.8288817343.

The spelling of 16940709 in words is "sixteen million, nine hundred forty thousand, seven hundred nine".