16340993 has 4 divisors (see below), whose sum is σ = 16399428. Its totient is φ = 16282560.

The previous prime is 16340983. The next prime is 16341019. The reversal of 16340993 is 39904361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39904361 = 7 ⋅5700623.

It can be written as a sum of positive squares in 2 ways, for example, as 3717184 + 12623809 = 1928^2 + 3553^2 .

It is a cyclic number.

It is not a de Polignac number, because 16340993 - 2¹⁰ = 16339969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16340983) 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, 28796 + ... + 29357.

It is an arithmetic number, because the mean of its divisors is an integer number (4099857).

Almost surely, 2^16340993 is an apocalyptic number.

It is an amenable number.

16340993 is a deficient number, since it is larger than the sum of its proper divisors (58435).

16340993 is an equidigital number, since it uses as much as digits as its factorization.

16340993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58434.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 16340993 is about 4042.3994112408. The cubic root of 16340993 is about 253.7617426033.

The spelling of 16340993 in words is "sixteen million, three hundred forty thousand, nine hundred ninety-three".