19449799 has 4 divisors (see below), whose sum is σ = 19638736. Its totient is φ = 19260864.

The previous prime is 19449797. The next prime is 19449809. The reversal of 19449799 is 99794491.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19449799 - 2¹ = 19449797 is a prime.

It is a super-2 number, since 2×19449799² = 756589362280802, 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 (19449797) 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, 94314 + ... + 94519.

It is an arithmetic number, because the mean of its divisors is an integer number (4909684).

Almost surely, 2^19449799 is an apocalyptic number.

19449799 is a deficient number, since it is larger than the sum of its proper divisors (188937).

19449799 is a wasteful number, since it uses less digits than its factorization.

19449799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188936.

The product of its digits is 734832, while the sum is 52.

The square root of 19449799 is about 4410.1926261786. The cubic root of 19449799 is about 268.9294554815.

The spelling of 19449799 in words is "nineteen million, four hundred forty-nine thousand, seven hundred ninety-nine".