16390769 has 4 divisors (see below), whose sum is σ = 16559844. Its totient is φ = 16221696.

The previous prime is 16390753. The next prime is 16390799. The reversal of 16390769 is 96709361.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96709361 = 7 ⋅13815623.

It can be written as a sum of positive squares in 2 ways, for example, as 6310144 + 10080625 = 2512^2 + 3175^2 .

It is a cyclic number.

It is not a de Polignac number, because 16390769 - 2⁴ = 16390753 is a prime.

It is a super-2 number, since 2×16390769² = 537314616822722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16390799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84392 + ... + 84585.

It is an arithmetic number, because the mean of its divisors is an integer number (4139961).

Almost surely, 2^16390769 is an apocalyptic number.

It is an amenable number.

16390769 is a deficient number, since it is larger than the sum of its proper divisors (169075).

16390769 is an equidigital number, since it uses as much as digits as its factorization.

16390769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169074.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 16390769 is about 4048.5514693530. The cubic root of 16390769 is about 254.0191410958.

The spelling of 16390769 in words is "sixteen million, three hundred ninety thousand, seven hundred sixty-nine".