120842779 has 2 divisors, whose sum is σ = 120842780. Its totient is φ = 120842778.

The previous prime is 120842753. The next prime is 120842789. The reversal of 120842779 is 977248021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 120842779 - 2⁵ = 120842747 is a prime.

It is not a weakly prime, because it can be changed into another prime (120842789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60421389 + 60421390.

It is an arithmetic number, because the mean of its divisors is an integer number (60421390).

Almost surely, 2^120842779 is an apocalyptic number.

120842779 is a deficient number, since it is larger than the sum of its proper divisors (1).

120842779 is an equidigital number, since it uses as much as digits as its factorization.

120842779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 120842779 is about 10992.8512679832. The cubic root of 120842779 is about 494.3944286608.

The spelling of 120842779 in words is "one hundred twenty million, eight hundred forty-two thousand, seven hundred seventy-nine".