16671613 has 6 divisors (see below), whose sum is σ = 19393566. Its totient is φ = 14289912.

The previous prime is 16671559. The next prime is 16671631. The reversal of 16671613 is 31617661.

It can be written as a sum of positive squares in only one way, i.e., 15697444 + 974169 = 3962^2 + 987^2 .

It is not a de Polignac number, because 16671613 - 2¹³ = 16663421 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 (16671643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 170070 + ... + 170167.

It is an arithmetic number, because the mean of its divisors is an integer number (3232261).

Almost surely, 2^16671613 is an apocalyptic number.

It is an amenable number.

16671613 is a deficient number, since it is larger than the sum of its proper divisors (2721953).

16671613 is an equidigital number, since it uses as much as digits as its factorization.

16671613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340251 (or 340244 counting only the distinct ones).

The product of its digits is 4536, while the sum is 31.

The square root of 16671613 is about 4083.0886593362. The cubic root of 16671613 is about 255.4617444444.

The spelling of 16671613 in words is "sixteen million, six hundred seventy-one thousand, six hundred thirteen".