19314139 has 4 divisors (see below), whose sum is σ = 20799856. Its totient is φ = 17828424.

The previous prime is 19314137. The next prime is 19314187. The reversal of 19314139 is 93141391.

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 19314139 - 2¹ = 19314137 is a prime.

It is a super-2 number, since 2×19314139² = 746071930622642, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19314139.

It is not an unprimeable number, because it can be changed into a prime (19314137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 742839 + ... + 742864.

It is an arithmetic number, because the mean of its divisors is an integer number (5199964).

Almost surely, 2^19314139 is an apocalyptic number.

19314139 is a deficient number, since it is larger than the sum of its proper divisors (1485717).

19314139 is a wasteful number, since it uses less digits than its factorization.

19314139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1485716.

The product of its digits is 2916, while the sum is 31.

The square root of 19314139 is about 4394.7854327601. The cubic root of 19314139 is about 268.3027459787.

The spelling of 19314139 in words is "nineteen million, three hundred fourteen thousand, one hundred thirty-nine".