120578999 has 4 divisors (see below), whose sum is σ = 121119936. Its totient is φ = 120038064.

The previous prime is 120578989. The next prime is 120579001. The reversal of 120578999 is 999875021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120578999 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 (120578929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270134 + ... + 270579.

It is an arithmetic number, because the mean of its divisors is an integer number (30279984).

Almost surely, 2^120578999 is an apocalyptic number.

120578999 is a deficient number, since it is larger than the sum of its proper divisors (540937).

120578999 is an equidigital number, since it uses as much as digits as its factorization.

120578999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540936.

The product of its (nonzero) digits is 408240, while the sum is 50.

The square root of 120578999 is about 10980.8469163357. The cubic root of 120578999 is about 494.0344392388.

The spelling of 120578999 in words is "one hundred twenty million, five hundred seventy-eight thousand, nine hundred ninety-nine".