121868579 has 16 divisors (see below), whose sum is σ = 143818752. Its totient is φ = 101098368.

The previous prime is 121868561. The next prime is 121868623. The reversal of 121868579 is 975868121.

It is a de Polignac number, because none of the positive numbers 2^k-121868579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121868479) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32222 + ... + 35804.

It is an arithmetic number, because the mean of its divisors is an integer number (8988672).

Almost surely, 2^121868579 is an apocalyptic number.

121868579 is a deficient number, since it is larger than the sum of its proper divisors (21950173).

121868579 is a wasteful number, since it uses less digits than its factorization.

121868579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3746.

The product of its digits is 241920, while the sum is 47.

The square root of 121868579 is about 11039.4102650459. The cubic root of 121868579 is about 495.7894134548.

The spelling of 121868579 in words is "one hundred twenty-one million, eight hundred sixty-eight thousand, five hundred seventy-nine".