16391613 has 8 divisors (see below), whose sum is σ = 24977728. Its totient is φ = 9366624.

The previous prime is 16391569. The next prime is 16391633. The reversal of 16391613 is 31619361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16391613 - 2⁶ = 16391549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16391633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390256 + ... + 390297.

It is an arithmetic number, because the mean of its divisors is an integer number (3122216).

Almost surely, 2^16391613 is an apocalyptic number.

It is an amenable number.

16391613 is a deficient number, since it is larger than the sum of its proper divisors (8586115).

16391613 is an equidigital number, since it uses as much as digits as its factorization.

16391613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780563.

The product of its digits is 2916, while the sum is 30.

The square root of 16391613 is about 4048.6557028229. The cubic root of 16391613 is about 254.0235010392.

The spelling of 16391613 in words is "sixteen million, three hundred ninety-one thousand, six hundred thirteen".