117729647 has 8 divisors (see below), whose sum is σ = 139188000. Its totient is φ = 97431264.

The previous prime is 117729637. The next prime is 117729659. The reversal of 117729647 is 746927711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 117729647 - 2¹⁰ = 117728623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 117729598 and 117729607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117729637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 289772 + ... + 290177.

It is an arithmetic number, because the mean of its divisors is an integer number (17398500).

Almost surely, 2^117729647 is an apocalyptic number.

117729647 is a deficient number, since it is larger than the sum of its proper divisors (21458353).

117729647 is an equidigital number, since it uses as much as digits as its factorization.

117729647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579985.

The product of its digits is 148176, while the sum is 44.

The square root of 117729647 is about 10850.3293498400. The cubic root of 117729647 is about 490.1119374976. Note that the first 3 decimals are identical.

The spelling of 117729647 in words is "one hundred seventeen million, seven hundred twenty-nine thousand, six hundred forty-seven".