19470139 has 8 divisors (see below), whose sum is σ = 21644672. Its totient is φ = 17392320.

The previous prime is 19470127. The next prime is 19470161. The reversal of 19470139 is 93107491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19470139 - 2¹¹ = 19468091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19470109) 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 7 ways as a sum of consecutive naturals, for example, 23754 + ... + 24559.

It is an arithmetic number, because the mean of its divisors is an integer number (2705584).

Almost surely, 2^19470139 is an apocalyptic number.

19470139 is a deficient number, since it is larger than the sum of its proper divisors (2174533).

19470139 is a wasteful number, since it uses less digits than its factorization.

19470139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48357.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 19470139 is about 4412.4980453253. The cubic root of 19470139 is about 269.0231688653.

The spelling of 19470139 in words is "nineteen million, four hundred seventy thousand, one hundred thirty-nine".