16688901 has 8 divisors (see below), whose sum is σ = 22725504. Its totient is φ = 10889120.

The previous prime is 16688899. The next prime is 16688909. The reversal of 16688901 is 10988661.

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 16688901 - 2¹ = 16688899 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16688901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16688909) 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, 59040 + ... + 59321.

It is an arithmetic number, because the mean of its divisors is an integer number (2840688).

Almost surely, 2^16688901 is an apocalyptic number.

It is an amenable number.

16688901 is a deficient number, since it is larger than the sum of its proper divisors (6036603).

16688901 is a wasteful number, since it uses less digits than its factorization.

16688901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118411.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 16688901 is about 4085.2051356082. The cubic root of 16688901 is about 255.5500161860.

The spelling of 16688901 in words is "sixteen million, six hundred eighty-eight thousand, nine hundred one".