16439131 has 4 divisors (see below), whose sum is σ = 16500064. Its totient is φ = 16378200.

The previous prime is 16439117. The next prime is 16439141. The reversal of 16439131 is 13193461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13193461 = 2731 ⋅4831.

It is a cyclic number.

It is not a de Polignac number, because 16439131 - 2⁵ = 16439099 is a prime.

It is a super-2 number, since 2×16439131² = 540490056070322, which contains 22 as substring.

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 16439131.

It is not an unprimeable number, because it can be changed into a prime (16439141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30060 + ... + 30601.

It is an arithmetic number, because the mean of its divisors is an integer number (4125016).

Almost surely, 2^16439131 is an apocalyptic number.

16439131 is a deficient number, since it is larger than the sum of its proper divisors (60933).

16439131 is an equidigital number, since it uses as much as digits as its factorization.

16439131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60932.

The product of its digits is 1944, while the sum is 28.

The square root of 16439131 is about 4054.5198236043. The cubic root of 16439131 is about 254.2687289591.

The spelling of 16439131 in words is "sixteen million, four hundred thirty-nine thousand, one hundred thirty-one".