120856779 has 24 divisors (see below), whose sum is σ = 181621440. Its totient is φ = 80311176.

The previous prime is 120856753. The next prime is 120856781. The reversal of 120856779 is 977658021.

120856779 is a `hidden beast` number, since 12 + 0 + 8 + 567 + 79 = 666.

It is not a de Polignac number, because 120856779 - 2⁸ = 120856523 is a prime.

It is a super-2 number, since 2×120856779² = 29212722060509682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (120856709) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 101224 + ... + 102410.

It is an arithmetic number, because the mean of its divisors is an integer number (7567560).

Almost surely, 2^120856779 is an apocalyptic number.

120856779 is a deficient number, since it is larger than the sum of its proper divisors (60764661).

120856779 is an equidigital number, since it uses as much as digits as its factorization.

120856779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1621 (or 1609 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The square root of 120856779 is about 10993.4880270094. The cubic root of 120856779 is about 494.4135202849.

The spelling of 120856779 in words is "one hundred twenty million, eight hundred fifty-six thousand, seven hundred seventy-nine".