16980749 has 8 divisors (see below), whose sum is σ = 17284920. Its totient is φ = 16678656.

The previous prime is 16980709. The next prime is 16980751. The reversal of 16980749 is 94708961.

It can be written as a sum of positive squares in 4 ways, for example, as 8743849 + 8236900 = 2957^2 + 2870^2 .

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 16980749 - 2⁸ = 16980493 is a prime.

It is a super-3 number, since 3×16980749³ (a number of 23 digits) contains 333 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 (16980709) 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, 33107 + ... + 33615.

It is an arithmetic number, because the mean of its divisors is an integer number (2160615).

Almost surely, 2^16980749 is an apocalyptic number.

It is an amenable number.

16980749 is a deficient number, since it is larger than the sum of its proper divisors (304171).

16980749 is an equidigital number, since it uses as much as digits as its factorization.

16980749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 16980749 is about 4120.7704376730. The cubic root of 16980749 is about 257.0310640886.

The spelling of 16980749 in words is "sixteen million, nine hundred eighty thousand, seven hundred forty-nine".