117736138129 has 3 divisors (see below), whose sum is σ = 117736481257. Its totient is φ = 117735795002.

The previous prime is 117736138123. The next prime is 117736138147. The reversal of 117736138129 is 921831637711.

The square root of 117736138129 is 343127.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 921831637711 = 202121 ⋅4560791.

It is not a de Polignac number, because 117736138129 - 2²³ = 117727749521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117736138123) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 171564 + ... + 514690.

Almost surely, 2^117736138129 is an apocalyptic number.

117736138129 is the 343127-th square number.

117736138129 is the 171564-th centered octagonal number.

It is an amenable number.

117736138129 is a deficient number, since it is larger than the sum of its proper divisors (343128).

117736138129 is an frugal number, since it uses more digits than its factorization.

117736138129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686254 (or 343127 counting only the distinct ones).

The product of its digits is 381024, while the sum is 49.

Multiplying 117736138129 by its sum of digits (49), we get a square (5769070768321 = 2401889²).

The spelling of 117736138129 in words is "one hundred seventeen billion, seven hundred thirty-six million, one hundred thirty-eight thousand, one hundred twenty-nine".