117920297 has 4 divisors (see below), whose sum is σ = 128640336. Its totient is φ = 107200260.

The previous prime is 117920273. The next prime is 117920323. The reversal of 117920297 is 792029711.

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.

It is a cyclic number.

It is not a de Polignac number, because 117920297 - 2¹⁰ = 117919273 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 117920297.

It is not an unprimeable number, because it can be changed into a prime (117920207) 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, 5360003 + ... + 5360024.

It is an arithmetic number, because the mean of its divisors is an integer number (32160084).

Almost surely, 2^117920297 is an apocalyptic number.

It is an amenable number.

117920297 is a deficient number, since it is larger than the sum of its proper divisors (10720039).

117920297 is a wasteful number, since it uses less digits than its factorization.

117920297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10720038.

The product of its (nonzero) digits is 15876, while the sum is 38.

The square root of 117920297 is about 10859.1112435595. Note that the first 3 decimals coincide. The cubic root of 117920297 is about 490.3763553117.

The spelling of 117920297 in words is "one hundred seventeen million, nine hundred twenty thousand, two hundred ninety-seven".