16138291 has 4 divisors (see below), whose sum is σ = 17379712. Its totient is φ = 14896872.

The previous prime is 16138289. The next prime is 16138301. The reversal of 16138291 is 19283161.

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 16138291 - 2¹ = 16138289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16138231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 620691 + ... + 620716.

It is an arithmetic number, because the mean of its divisors is an integer number (4344928).

Almost surely, 2^16138291 is an apocalyptic number.

16138291 is a deficient number, since it is larger than the sum of its proper divisors (1241421).

16138291 is a wasteful number, since it uses less digits than its factorization.

16138291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241420.

The product of its digits is 2592, while the sum is 31.

The square root of 16138291 is about 4017.2491832098. The cubic root of 16138291 is about 252.7081106226.

The spelling of 16138291 in words is "sixteen million, one hundred thirty-eight thousand, two hundred ninety-one".