19449479 has 16 divisors (see below), whose sum is σ = 23727168. Its totient is φ = 15562752.

The previous prime is 19449461. The next prime is 19449487. The reversal of 19449479 is 97494491.

It is not a de Polignac number, because 19449479 - 2⁸ = 19449223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19449449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15707 + ... + 16899.

It is an arithmetic number, because the mean of its divisors is an integer number (1482948).

Almost surely, 2^19449479 is an apocalyptic number.

19449479 is a deficient number, since it is larger than the sum of its proper divisors (4277689).

19449479 is a wasteful number, since it uses less digits than its factorization.

19449479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354.

The product of its digits is 326592, while the sum is 47.

The square root of 19449479 is about 4410.1563464349. The cubic root of 19449479 is about 268.9279806094.

The spelling of 19449479 in words is "nineteen million, four hundred forty-nine thousand, four hundred seventy-nine".