13938507787 has 8 divisors (see below), whose sum is σ = 14674804560. Its totient is φ = 13202480160.

The previous prime is 13938507767. The next prime is 13938507797. The reversal of 13938507787 is 78770583931.

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 13938507787 - 2²³ = 13930119179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13938507767) 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, 43737 + ... + 172597.

It is an arithmetic number, because the mean of its divisors is an integer number (1834350570).

Almost surely, 2^13938507787 is an apocalyptic number.

13938507787 is a deficient number, since it is larger than the sum of its proper divisors (736296773).

13938507787 is a wasteful number, since it uses less digits than its factorization.

13938507787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134573.

The product of its (nonzero) digits is 8890560, while the sum is 58.

The spelling of 13938507787 in words is "thirteen billion, nine hundred thirty-eight million, five hundred seven thousand, seven hundred eighty-seven".