16612019 has 4 divisors (see below), whose sum is σ = 16621920. Its totient is φ = 16602120.

The previous prime is 16611989. The next prime is 16612021. The reversal of 16612019 is 91021661.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16612019 is a prime.

It is a super-2 number, since 2×16612019² = 551918350512722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16612039) 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, 1739 + ... + 6020.

It is an arithmetic number, because the mean of its divisors is an integer number (4155480).

Almost surely, 2^16612019 is an apocalyptic number.

16612019 is a deficient number, since it is larger than the sum of its proper divisors (9901).

16612019 is an equidigital number, since it uses as much as digits as its factorization.

16612019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9900.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 16612019 is about 4075.7844643700. The cubic root of 16612019 is about 255.1569916271.

The spelling of 16612019 in words is "sixteen million, six hundred twelve thousand, nineteen".