16129139 has 4 divisors (see below), whose sum is σ = 17369856. Its totient is φ = 14888424.

The previous prime is 16129129. The next prime is 16129159. The reversal of 16129139 is 93192161.

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 16129139 - 2⁸ = 16128883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16129109) 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, 620339 + ... + 620364.

It is an arithmetic number, because the mean of its divisors is an integer number (4342464).

Almost surely, 2^16129139 is an apocalyptic number.

16129139 is a deficient number, since it is larger than the sum of its proper divisors (1240717).

16129139 is a wasteful number, since it uses less digits than its factorization.

16129139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240716.

The product of its digits is 2916, while the sum is 32.

The square root of 16129139 is about 4016.1099337543. The cubic root of 16129139 is about 252.6603314627.

The spelling of 16129139 in words is "sixteen million, one hundred twenty-nine thousand, one hundred thirty-nine".