16691234 has 32 divisors (see below), whose sum is σ = 30412800. Its totient is φ = 6711120.

The previous prime is 16691221. The next prime is 16691239. The reversal of 16691234 is 43219661.

16691234 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16691234.

It is not an unprimeable number, because it can be changed into a prime (16691239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34607 + ... + 35085.

It is an arithmetic number, because the mean of its divisors is an integer number (950400).

Almost surely, 2^16691234 is an apocalyptic number.

16691234 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

16691234 is a deficient number, since it is larger than the sum of its proper divisors (13721566).

16691234 is a wasteful number, since it uses less digits than its factorization.

16691234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638.

The product of its digits is 7776, while the sum is 32.

The square root of 16691234 is about 4085.4906682062. The cubic root of 16691234 is about 255.5619237088.

The spelling of 16691234 in words is "sixteen million, six hundred ninety-one thousand, two hundred thirty-four".