16391379 has 4 divisors (see below), whose sum is σ = 21855176. Its totient is φ = 10927584.

The previous prime is 16391377. The next prime is 16391393. The reversal of 16391379 is 97319361.

Added to its reverse (97319361) it gives a triangular number (113710740 = T₁₅₀₈₀).

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

It is not a de Polignac number, because 16391379 - 2¹ = 16391377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16391377) 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, 2731894 + ... + 2731899.

It is an arithmetic number, because the mean of its divisors is an integer number (5463794).

Almost surely, 2^16391379 is an apocalyptic number.

16391379 is a deficient number, since it is larger than the sum of its proper divisors (5463797).

16391379 is an equidigital number, since it uses as much as digits as its factorization.

16391379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5463796.

The product of its digits is 30618, while the sum is 39.

The square root of 16391379 is about 4048.6268042387. The cubic root of 16391379 is about 254.0222922547.

Adding to 16391379 its reverse (97319361), we get a triangular number (113710740 = T₁₅₀₈₀).

The spelling of 16391379 in words is "sixteen million, three hundred ninety-one thousand, three hundred seventy-nine".