16316591 has 4 divisors (see below), whose sum is σ = 17026032. Its totient is φ = 15607152.

The previous prime is 16316569. The next prime is 16316603. The reversal of 16316591 is 19561361.

It is a happy number.

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 16316591 - 2¹⁰ = 16315567 is a prime.

It is a super-2 number, since 2×16316591² = 532462283722562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16316501) 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, 354686 + ... + 354731.

It is an arithmetic number, because the mean of its divisors is an integer number (4256508).

Almost surely, 2^16316591 is an apocalyptic number.

16316591 is a deficient number, since it is larger than the sum of its proper divisors (709441).

16316591 is an equidigital number, since it uses as much as digits as its factorization.

16316591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709440.

The product of its digits is 4860, while the sum is 32.

The square root of 16316591 is about 4039.3800266873. The cubic root of 16316591 is about 253.6353655645.

The spelling of 16316591 in words is "sixteen million, three hundred sixteen thousand, five hundred ninety-one".