13944378587 has 8 divisors (see below), whose sum is σ = 13982694336. Its totient is φ = 13906111552.

The previous prime is 13944378583. The next prime is 13944378601. The reversal of 13944378587 is 78587344931.

It is a happy number.

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 13944378587 - 2² = 13944378583 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13944378583) 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, 603023 + ... + 625719.

It is an arithmetic number, because the mean of its divisors is an integer number (1747836792).

Almost surely, 2^13944378587 is an apocalyptic number.

13944378587 is a deficient number, since it is larger than the sum of its proper divisors (38315749).

13944378587 is a wasteful number, since it uses less digits than its factorization.

13944378587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24357.

The product of its digits is 20321280, while the sum is 59.

The spelling of 13944378587 in words is "thirteen billion, nine hundred forty-four million, three hundred seventy-eight thousand, five hundred eighty-seven".