16405069 has 4 divisors (see below), whose sum is σ = 16423840. Its totient is φ = 16386300.

The previous prime is 16405057. The next prime is 16405079. The reversal of 16405069 is 96050461.

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.

It is a cyclic number.

It is not a de Polignac number, because 16405069 - 2¹¹ = 16403021 is a prime.

It is a super-2 number, since 2×16405069² = 538252577789522, which contains 22 as substring.

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 16405069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16405079) 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, 8007 + ... + 9844.

It is an arithmetic number, because the mean of its divisors is an integer number (4105960).

Almost surely, 2^16405069 is an apocalyptic number.

It is an amenable number.

16405069 is a deficient number, since it is larger than the sum of its proper divisors (18771).

16405069 is an equidigital number, since it uses as much as digits as its factorization.

16405069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18770.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 16405069 is about 4050.3171480762. The cubic root of 16405069 is about 254.0929919699.

The spelling of 16405069 in words is "sixteen million, four hundred five thousand, sixty-nine".