19000049 has 4 divisors (see below), whose sum is σ = 19136880. Its totient is φ = 18863220.

The previous prime is 19000043. The next prime is 19000073. The reversal of 19000049 is 94000091.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19000049 is a prime.

It is a super-2 number, since 2×19000049² = 722003724004802, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18999988 and 19000033.

It is not an unprimeable number, because it can be changed into a prime (19000043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68207 + ... + 68484.

It is an arithmetic number, because the mean of its divisors is an integer number (4784220).

Almost surely, 2^19000049 is an apocalyptic number.

It is an amenable number.

19000049 is a deficient number, since it is larger than the sum of its proper divisors (136831).

19000049 is a wasteful number, since it uses less digits than its factorization.

19000049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136830.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 19000049 is about 4358.9045642225. The cubic root of 19000049 is about 266.8403942609.

The spelling of 19000049 in words is "nineteen million, forty-nine", and thus it is an aban number and an uban number.