120779987 has 4 divisors (see below), whose sum is σ = 121352616. Its totient is φ = 120207360.

The previous prime is 120779959. The next prime is 120780007. The reversal of 120779987 is 789977021.

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-120779987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120779927) 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, 285998 + ... + 286419.

It is an arithmetic number, because the mean of its divisors is an integer number (30338154).

Almost surely, 2^120779987 is an apocalyptic number.

120779987 is a deficient number, since it is larger than the sum of its proper divisors (572629).

120779987 is an equidigital number, since it uses as much as digits as its factorization.

120779987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572628.

The product of its (nonzero) digits is 444528, while the sum is 50.

The square root of 120779987 is about 10989.9948589615. The cubic root of 120779987 is about 494.3087818566.

The spelling of 120779987 in words is "one hundred twenty million, seven hundred seventy-nine thousand, nine hundred eighty-seven".