117973729 has 4 divisors (see below), whose sum is σ = 118902784. Its totient is φ = 117044676.

The previous prime is 117973703. The next prime is 117973777. The reversal of 117973729 is 927379711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 927379711 = 23 ⋅40320857.

It is a cyclic number.

It is not a de Polignac number, because 117973729 - 2⁵ = 117973697 is a prime.

It is a super-3 number, since 3×117973729³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117970729) 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, 464337 + ... + 464590.

It is an arithmetic number, because the mean of its divisors is an integer number (29725696).

Almost surely, 2^117973729 is an apocalyptic number.

It is an amenable number.

117973729 is a deficient number, since it is larger than the sum of its proper divisors (929055).

117973729 is an equidigital number, since it uses as much as digits as its factorization.

117973729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929054.

The product of its digits is 166698, while the sum is 46.

The square root of 117973729 is about 10861.5712030995. The cubic root of 117973729 is about 490.4504105099.

The spelling of 117973729 in words is "one hundred seventeen million, nine hundred seventy-three thousand, seven hundred twenty-nine".