121903998 has 16 divisors (see below), whose sum is σ = 245729280. Its totient is φ = 40314456.

The previous prime is 121903987. The next prime is 121904053. The reversal of 121903998 is 899309121.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79228 + ... + 80751.

It is an arithmetic number, because the mean of its divisors is an integer number (15358080).

Almost surely, 2^121903998 is an apocalyptic number.

121903998 is an abundant number, since it is smaller than the sum of its proper divisors (123825282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121903998 is a wasteful number, since it uses less digits than its factorization.

121903998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160111.

The product of its (nonzero) digits is 34992, while the sum is 42.

The square root of 121903998 is about 11041.0143555744. The cubic root of 121903998 is about 495.8374396823.

The spelling of 121903998 in words is "one hundred twenty-one million, nine hundred three thousand, nine hundred ninety-eight".