13919487 has 8 divisors (see below), whose sum is σ = 18991104. Its totient is φ = 9063768.

The previous prime is 13919471. The next prime is 13919491. The reversal of 13919487 is 78491931.

It is a happy number.

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

It is not a de Polignac number, because 13919487 - 2⁴ = 13919471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13919417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53823 + ... + 54080.

It is an arithmetic number, because the mean of its divisors is an integer number (2373888).

Almost surely, 2^13919487 is an apocalyptic number.

13919487 is a deficient number, since it is larger than the sum of its proper divisors (5071617).

13919487 is a wasteful number, since it uses less digits than its factorization.

13919487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107949.

The product of its digits is 54432, while the sum is 42.

The square root of 13919487 is about 3730.8828713858. The cubic root of 13919487 is about 240.5513193648.

It can be divided in two parts, 1391 and 9487, that added together give a triangular number (10878 = T₁₄₇).

The spelling of 13919487 in words is "thirteen million, nine hundred nineteen thousand, four hundred eighty-seven".