16517047 has 4 divisors (see below), whose sum is σ = 17488656. Its totient is φ = 15545440.

The previous prime is 16517029. The next prime is 16517057. The reversal of 16517047 is 74071561.

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

It is a cyclic number.

It is not a de Polignac number, because 16517047 - 2⁷ = 16516919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16517027) 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, 485779 + ... + 485812.

It is an arithmetic number, because the mean of its divisors is an integer number (4372164).

Almost surely, 2^16517047 is an apocalyptic number.

16517047 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

16517047 is a deficient number, since it is larger than the sum of its proper divisors (971609).

16517047 is an equidigital number, since it uses as much as digits as its factorization.

16517047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971608.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 16517047 is about 4064.1170012685. The cubic root of 16517047 is about 254.6698122912.

The spelling of 16517047 in words is "sixteen million, five hundred seventeen thousand, forty-seven".