138731459997 has 36 divisors (see below), whose sum is σ = 206829539712. Its totient is φ = 82591423200.

The previous prime is 138731459983. The next prime is 138731460019. The reversal of 138731459997 is 799954137831.

It is not a de Polignac number, because 138731459997 - 2¹⁵ = 138731427229 is a prime.

It is a super-2 number, since 2×138731459997² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138731459917) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 46693722 + ... + 46696692.

It is an arithmetic number, because the mean of its divisors is an integer number (5745264992).

Almost surely, 2^138731459997 is an apocalyptic number.

It is an amenable number.

138731459997 is a deficient number, since it is larger than the sum of its proper divisors (68098079715).

138731459997 is an frugal number, since it uses more digits than its factorization.

138731459997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6002 (or 3018 counting only the distinct ones).

The product of its digits is 51438240, while the sum is 66.

The spelling of 138731459997 in words is "one hundred thirty-eight billion, seven hundred thirty-one million, four hundred fifty-nine thousand, nine hundred ninety-seven".