19270139 has 4 divisors (see below), whose sum is σ = 22023024. Its totient is φ = 16517256.

The previous prime is 19270087. The next prime is 19270157. The reversal of 19270139 is 93107291.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93107291 = 31 ⋅3003461.

It is not a de Polignac number, because 19270139 - 2²⁰ = 18221563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19270169) 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, 1376432 + ... + 1376445.

It is an arithmetic number, because the mean of its divisors is an integer number (5505756).

Almost surely, 2^19270139 is an apocalyptic number.

19270139 is a deficient number, since it is larger than the sum of its proper divisors (2752885).

19270139 is an equidigital number, since it uses as much as digits as its factorization.

19270139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2752884.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 19270139 is about 4389.7766457987. The cubic root of 19270139 is about 268.0988487743.

The spelling of 19270139 in words is "nineteen million, two hundred seventy thousand, one hundred thirty-nine".