16688497 has 4 divisors (see below), whose sum is σ = 19072576. Its totient is φ = 14304420.

The previous prime is 16688473. The next prime is 16688519. The reversal of 16688497 is 79488661.

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 16688497 - 2¹⁵ = 16655729 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16688497.

It is not an unprimeable number, because it can be changed into a prime (16688437) 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, 1192029 + ... + 1192042.

It is an arithmetic number, because the mean of its divisors is an integer number (4768144).

Almost surely, 2^16688497 is an apocalyptic number.

It is an amenable number.

16688497 is a deficient number, since it is larger than the sum of its proper divisors (2384079).

16688497 is an equidigital number, since it uses as much as digits as its factorization.

16688497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2384078.

The product of its digits is 580608, while the sum is 49.

The square root of 16688497 is about 4085.1556885876. The cubic root of 16688497 is about 255.5479540762.

The spelling of 16688497 in words is "sixteen million, six hundred eighty-eight thousand, four hundred ninety-seven".