121389579 has 12 divisors (see below), whose sum is σ = 179071776. Its totient is φ = 79204272.

The previous prime is 121389547. The next prime is 121389589. The reversal of 121389579 is 975983121.

It is not a de Polignac number, because 121389579 - 2⁵ = 121389547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121389509) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143064 + ... + 143909.

It is an arithmetic number, because the mean of its divisors is an integer number (14922648).

Almost surely, 2^121389579 is an apocalyptic number.

121389579 is a deficient number, since it is larger than the sum of its proper divisors (57682197).

121389579 is a wasteful number, since it uses less digits than its factorization.

121389579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287026 (or 287023 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 121389579 is about 11017.6939057137. The cubic root of 121389579 is about 495.1389998377.

The spelling of 121389579 in words is "one hundred twenty-one million, three hundred eighty-nine thousand, five hundred seventy-nine".