16201939 has 4 divisors (see below), whose sum is σ = 17448256. Its totient is φ = 14955624.

The previous prime is 16201937. The next prime is 16201951. The reversal of 16201939 is 93910261.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16201939 - 2¹ = 16201937 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 16201939.

It is not an unprimeable number, because it can be changed into a prime (16201937) 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, 623139 + ... + 623164.

It is an arithmetic number, because the mean of its divisors is an integer number (4362064).

Almost surely, 2^16201939 is an apocalyptic number.

16201939 is a deficient number, since it is larger than the sum of its proper divisors (1246317).

16201939 is a wasteful number, since it uses less digits than its factorization.

16201939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246316.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 16201939 is about 4025.1632265040. The cubic root of 16201939 is about 253.0398943479.

The spelling of 16201939 in words is "sixteen million, two hundred one thousand, nine hundred thirty-nine".