16742993 has 4 divisors (see below), whose sum is σ = 16812708. Its totient is φ = 16673280.

The previous prime is 16742987. The next prime is 16743017. The reversal of 16742993 is 39924761.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11135569 + 5607424 = 3337^2 + 2368^2 .

It is a cyclic number.

It is not a de Polignac number, because 16742993 - 2¹⁴ = 16726609 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 16742993.

It is not an unprimeable number, because it can be changed into a prime (16742923) 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, 34496 + ... + 34977.

It is an arithmetic number, because the mean of its divisors is an integer number (4203177).

Almost surely, 2^16742993 is an apocalyptic number.

It is an amenable number.

16742993 is a deficient number, since it is larger than the sum of its proper divisors (69715).

16742993 is an equidigital number, since it uses as much as digits as its factorization.

16742993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69714.

The product of its digits is 81648, while the sum is 41.

The square root of 16742993 is about 4091.8202550943. The cubic root of 16742993 is about 255.8258143294.

The spelling of 16742993 in words is "sixteen million, seven hundred forty-two thousand, nine hundred ninety-three".