16907409 has 12 divisors (see below), whose sum is σ = 25082356. Its totient is φ = 10966752.

The previous prime is 16907393. The next prime is 16907413. The reversal of 16907409 is 90470961.

It can be written as a sum of positive squares in 2 ways, for example, as 14085009 + 2822400 = 3753^2 + 1680^2 .

It is not a de Polignac number, because 16907409 - 2⁴ = 16907393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16907459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25054 + ... + 25719.

Almost surely, 2^16907409 is an apocalyptic number.

It is an amenable number.

16907409 is a deficient number, since it is larger than the sum of its proper divisors (8174947).

16907409 is a wasteful number, since it uses less digits than its factorization.

16907409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50816 (or 50813 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 16907409 is about 4111.8619869835. The cubic root of 16907409 is about 256.6604902845.

The spelling of 16907409 in words is "sixteen million, nine hundred seven thousand, four hundred nine".