137985447794687 has 4 divisors (see below), whose sum is σ = 137995283538120. Its totient is φ = 137975612051256.

The previous prime is 137985447794633. The next prime is 137985447794693. The reversal of 137985447794687 is 786497744589731.

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 137985447794687 - 2⁴⁴ = 120393261750271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137985447724687) 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, 4917850673 + ... + 4917878730.

It is an arithmetic number, because the mean of its divisors is an integer number (34498820884530).

Almost surely, 2^{137985447794687} is an apocalyptic number.

137985447794687 is a deficient number, since it is larger than the sum of its proper divisors (9835743433).

137985447794687 is an equidigital number, since it uses as much as digits as its factorization.

137985447794687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9835743432.

The product of its digits is 71693475840, while the sum is 89.

The spelling of 137985447794687 in words is "one hundred thirty-seven trillion, nine hundred eighty-five billion, four hundred forty-seven million, seven hundred ninety-four thousand, six hundred eighty-seven".