121679898 has 48 divisors (see below), whose sum is σ = 257385600. Its totient is φ = 38330880.

The previous prime is 121679893. The next prime is 121679917. The reversal of 121679898 is 898976121.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121679898.

It is not an unprimeable number, because it can be changed into a prime (121679893) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 270778 + ... + 271226.

It is an arithmetic number, because the mean of its divisors is an integer number (5362200).

Almost surely, 2^121679898 is an apocalyptic number.

121679898 is an abundant number, since it is smaller than the sum of its proper divisors (135705702).

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

121679898 is a wasteful number, since it uses less digits than its factorization.

121679898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563 (or 532 counting only the distinct ones).

The product of its digits is 435456, while the sum is 51.

The square root of 121679898 is about 11030.8611631187. The cubic root of 121679898 is about 495.5334153906.

The spelling of 121679898 in words is "one hundred twenty-one million, six hundred seventy-nine thousand, eight hundred ninety-eight".