120918559 has 4 divisors (see below), whose sum is σ = 120956904. Its totient is φ = 120880216.

The previous prime is 120918547. The next prime is 120918563. The reversal of 120918559 is 955819021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 955819021 = 20117 ⋅47513.

It is a cyclic number.

It is not a de Polignac number, because 120918559 - 2⁷ = 120918431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120918509) 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, 13972 + ... + 20905.

It is an arithmetic number, because the mean of its divisors is an integer number (30239226).

Almost surely, 2^120918559 is an apocalyptic number.

120918559 is a deficient number, since it is larger than the sum of its proper divisors (38345).

120918559 is an equidigital number, since it uses as much as digits as its factorization.

120918559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38344.

The product of its (nonzero) digits is 32400, while the sum is 40.

The square root of 120918559 is about 10996.2975132542. The cubic root of 120918559 is about 494.4977512905.

The spelling of 120918559 in words is "one hundred twenty million, nine hundred eighteen thousand, five hundred fifty-nine".