16149979 has 4 divisors (see below), whose sum is σ = 16852176. Its totient is φ = 15447784.

The previous prime is 16149901. The next prime is 16149989. The reversal of 16149979 is 97994161.

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 16149979 - 2¹³ = 16141787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16149989) 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, 351064 + ... + 351109.

It is an arithmetic number, because the mean of its divisors is an integer number (4213044).

Almost surely, 2^16149979 is an apocalyptic number.

16149979 is a deficient number, since it is larger than the sum of its proper divisors (702197).

16149979 is an equidigital number, since it uses as much as digits as its factorization.

16149979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702196.

The product of its digits is 122472, while the sum is 46.

The square root of 16149979 is about 4018.7036467000. The cubic root of 16149979 is about 252.7691030294.

The spelling of 16149979 in words is "sixteen million, one hundred forty-nine thousand, nine hundred seventy-nine".