38122739687 has 4 divisors (see below), whose sum is σ = 38933861856. Its totient is φ = 37311617520.

The previous prime is 38122739659. The next prime is 38122739723. The reversal of 38122739687 is 78693722183.

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 38122739687 - 2¹⁶ = 38122674151 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 (38122739387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 405561014 + ... + 405561107.

It is an arithmetic number, because the mean of its divisors is an integer number (9733465464).

Almost surely, 2^38122739687 is an apocalyptic number.

38122739687 is a deficient number, since it is larger than the sum of its proper divisors (811122169).

38122739687 is an equidigital number, since it uses as much as digits as its factorization.

38122739687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811122168.

The product of its digits is 6096384, while the sum is 56.

The spelling of 38122739687 in words is "thirty-eight billion, one hundred twenty-two million, seven hundred thirty-nine thousand, six hundred eighty-seven".