16419409 has 4 divisors (see below), whose sum is σ = 16544880. Its totient is φ = 16293940.

The previous prime is 16419407. The next prime is 16419419. The reversal of 16419409 is 90491461.

16419409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 16419409 - 2¹ = 16419407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16419407) 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, 62539 + ... + 62800.

It is an arithmetic number, because the mean of its divisors is an integer number (4136220).

Almost surely, 2^16419409 is an apocalyptic number.

It is an amenable number.

16419409 is a deficient number, since it is larger than the sum of its proper divisors (125471).

16419409 is a wasteful number, since it uses less digits than its factorization.

16419409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125470.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 16419409 is about 4052.0869931432. The cubic root of 16419409 is about 254.1670063360.

The spelling of 16419409 in words is "sixteen million, four hundred nineteen thousand, four hundred nine".