16973393 has 4 divisors (see below), whose sum is σ = 16981668. Its totient is φ = 16965120.

The previous prime is 16973377. The next prime is 16973401. The reversal of 16973393 is 39337961.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2289169 + 14684224 = 1513^2 + 3832^2 .

It is a cyclic number.

It is not a de Polignac number, because 16973393 - 2⁴ = 16973377 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16973393.

It is not an unprimeable number, because it can be changed into a prime (16973993) 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, 1505 + ... + 6017.

It is an arithmetic number, because the mean of its divisors is an integer number (4245417).

It is a Poulet number, since it divides 2^16973392-1.

Almost surely, 2^16973393 is an apocalyptic number.

It is an amenable number.

16973393 is a deficient number, since it is larger than the sum of its proper divisors (8275).

16973393 is an equidigital number, since it uses as much as digits as its factorization.

16973393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8274.

The product of its digits is 91854, while the sum is 41.

The square root of 16973393 is about 4119.8777894496. The cubic root of 16973393 is about 256.9939437474.

It can be divided in two parts, 1697 and 3393, that multiplied together give a triangular number (5757921 = T₃₃₉₃).

The spelling of 16973393 in words is "sixteen million, nine hundred seventy-three thousand, three hundred ninety-three".