16993297 has 4 divisors (see below), whose sum is σ = 17732160. Its totient is φ = 16254436.

The previous prime is 16993289. The next prime is 16993309. The reversal of 16993297 is 79239961.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79239961 = 4783 ⋅16567.

It is a cyclic number.

It is not a de Polignac number, because 16993297 - 2³ = 16993289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16993237) 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, 369397 + ... + 369442.

It is an arithmetic number, because the mean of its divisors is an integer number (4433040).

Almost surely, 2^16993297 is an apocalyptic number.

It is an amenable number.

16993297 is a deficient number, since it is larger than the sum of its proper divisors (738863).

16993297 is an equidigital number, since it uses as much as digits as its factorization.

16993297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738862.

The product of its digits is 183708, while the sum is 46.

The square root of 16993297 is about 4122.2926873283. The cubic root of 16993297 is about 257.0943599163.

The spelling of 16993297 in words is "sixteen million, nine hundred ninety-three thousand, two hundred ninety-seven".