16904513 has 4 divisors (see below), whose sum is σ = 16953300. Its totient is φ = 16855728.

The previous prime is 16904507. The next prime is 16904521. The reversal of 16904513 is 31540961.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9684544 + 7219969 = 3112^2 + 2687^2 .

It is a cyclic number.

It is not a de Polignac number, because 16904513 - 2¹⁰ = 16903489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16904533) 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, 23870 + ... + 24567.

It is an arithmetic number, because the mean of its divisors is an integer number (4238325).

Almost surely, 2^16904513 is an apocalyptic number.

It is an amenable number.

16904513 is a deficient number, since it is larger than the sum of its proper divisors (48787).

16904513 is an equidigital number, since it uses as much as digits as its factorization.

16904513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48786.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 16904513 is about 4111.5098200053. The cubic root of 16904513 is about 256.6458353439.

The spelling of 16904513 in words is "sixteen million, nine hundred four thousand, five hundred thirteen".