16724749 has 8 divisors (see below), whose sum is σ = 17664192. Its totient is φ = 15803040.

The previous prime is 16724737. The next prime is 16724767. The reversal of 16724749 is 94742761.

16724749 = 125² + 126² + ... + 373².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16724749 - 2¹⁷ = 16593677 is a prime.

It is a super-2 number, since 2×16724749² = 559434458226002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16728749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2472 + ... + 6289.

It is an arithmetic number, because the mean of its divisors is an integer number (2208024).

Almost surely, 2^16724749 is an apocalyptic number.

It is an amenable number.

16724749 is a deficient number, since it is larger than the sum of its proper divisors (939443).

16724749 is an equidigital number, since it uses as much as digits as its factorization.

16724749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8867.

The product of its digits is 84672, while the sum is 40.

The square root of 16724749 is about 4089.5903217804. The cubic root of 16724749 is about 255.7328603711.

The spelling of 16724749 in words is "sixteen million, seven hundred twenty-four thousand, seven hundred forty-nine".