16390717 has 4 divisors (see below), whose sum is σ = 18732256. Its totient is φ = 14049180.

The previous prime is 16390681. The next prime is 16390721. The reversal of 16390717 is 71709361.

It is a happy number.

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: 71709361 = 71 ⋅1009991.

It is a cyclic number.

It is not a de Polignac number, because 16390717 - 2¹⁵ = 16357949 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 (16390117) 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, 1170759 + ... + 1170772.

It is an arithmetic number, because the mean of its divisors is an integer number (4683064).

Almost surely, 2^16390717 is an apocalyptic number.

It is an amenable number.

16390717 is a deficient number, since it is larger than the sum of its proper divisors (2341539).

16390717 is an equidigital number, since it uses as much as digits as its factorization.

16390717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2341538.

The product of its (nonzero) digits is 7938, while the sum is 34.

The square root of 16390717 is about 4048.5450472979. The cubic root of 16390717 is about 254.0188724688.

The spelling of 16390717 in words is "sixteen million, three hundred ninety thousand, seven hundred seventeen".