16740689 has 4 divisors (see below), whose sum is σ = 19132224. Its totient is φ = 14349156.

The previous prime is 16740683. The next prime is 16740697. The reversal of 16740689 is 98604761.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16740689 - 2⁴ = 16740673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16740683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1195757 + ... + 1195770.

It is an arithmetic number, because the mean of its divisors is an integer number (4783056).

Almost surely, 2^16740689 is an apocalyptic number.

It is an amenable number.

16740689 is a deficient number, since it is larger than the sum of its proper divisors (2391535).

16740689 is an equidigital number, since it uses as much as digits as its factorization.

16740689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2391534.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 16740689 is about 4091.5387081146. The cubic root of 16740689 is about 255.8140790776.

The spelling of 16740689 in words is "sixteen million, seven hundred forty thousand, six hundred eighty-nine".