19614139 has 4 divisors (see below), whose sum is σ = 19628224. Its totient is φ = 19600056.

The previous prime is 19614109. The next prime is 19614143. The reversal of 19614139 is 93141691.

It is a happy number.

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 19614139 - 2¹⁵ = 19581371 is a prime.

It is a super-2 number, since 2×19614139² = 769428897422642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19614109) 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, 4692 + ... + 7825.

It is an arithmetic number, because the mean of its divisors is an integer number (4907056).

Almost surely, 2^19614139 is an apocalyptic number.

19614139 is a deficient number, since it is larger than the sum of its proper divisors (14085).

19614139 is a wasteful number, since it uses less digits than its factorization.

19614139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14084.

The product of its digits is 5832, while the sum is 34.

The square root of 19614139 is about 4428.7852736388. The cubic root of 19614139 is about 269.6847669873.

The spelling of 19614139 in words is "nineteen million, six hundred fourteen thousand, one hundred thirty-nine".