16691379 has 8 divisors (see below), whose sum is σ = 22342800. Its totient is φ = 11083776.

The previous prime is 16691371. The next prime is 16691401. The reversal of 16691379 is 97319661.

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

It is not a de Polignac number, because 16691379 - 2³ = 16691371 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16691379.

It is not an unprimeable number, because it can be changed into a prime (16691371) 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, 10054 + ... + 11595.

It is an arithmetic number, because the mean of its divisors is an integer number (2792850).

Almost surely, 2^16691379 is an apocalyptic number.

16691379 is a deficient number, since it is larger than the sum of its proper divisors (5651421).

16691379 is a wasteful number, since it uses less digits than its factorization.

16691379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21909.

The product of its digits is 61236, while the sum is 42.

The square root of 16691379 is about 4085.5084138942. The cubic root of 16691379 is about 255.5626637454.

The spelling of 16691379 in words is "sixteen million, six hundred ninety-one thousand, three hundred seventy-nine".