12117998 has 8 divisors (see below), whose sum is σ = 18803880. Its totient is φ = 5850040.

The previous prime is 12117997. The next prime is 12118003. The reversal of 12117998 is 89971121.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12117997) 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, 104408 + ... + 104523.

It is an arithmetic number, because the mean of its divisors is an integer number (2350485).

Almost surely, 2^12117998 is an apocalyptic number.

12117998 is a deficient number, since it is larger than the sum of its proper divisors (6685882).

12117998 is a wasteful number, since it uses less digits than its factorization.

12117998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208962.

The product of its digits is 9072, while the sum is 38.

The square root of 12117998 is about 3481.0914954939. The cubic root of 12117998 is about 229.6908132831.

The spelling of 12117998 in words is "twelve million, one hundred seventeen thousand, nine hundred ninety-eight".