16749019 has 4 divisors (see below), whose sum is σ = 19141744. Its totient is φ = 14356296.

The previous prime is 16749017. The next prime is 16749053. The reversal of 16749019 is 91094761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91094761 = 59 ⋅1543979.

It is a cyclic number.

It is not a de Polignac number, because 16749019 - 2¹ = 16749017 is a prime.

It is a super-2 number, since 2×16749019² = 561059274924722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16749011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1196352 + ... + 1196365.

It is an arithmetic number, because the mean of its divisors is an integer number (4785436).

Almost surely, 2^16749019 is an apocalyptic number.

16749019 is a deficient number, since it is larger than the sum of its proper divisors (2392725).

16749019 is an equidigital number, since it uses as much as digits as its factorization.

16749019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2392724.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 16749019 is about 4092.5565359565. The cubic root of 16749019 is about 255.8565022206.

The spelling of 16749019 in words is "sixteen million, seven hundred forty-nine thousand, nineteen".