120849109 has 2 divisors, whose sum is σ = 120849110. Its totient is φ = 120849108.

The previous prime is 120849097. The next prime is 120849137. The reversal of 120849109 is 901948021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83210884 + 37638225 = 9122^2 + 6135^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120849109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120849809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60424554 + 60424555.

It is an arithmetic number, because the mean of its divisors is an integer number (60424555).

Almost surely, 2^120849109 is an apocalyptic number.

It is an amenable number.

120849109 is a deficient number, since it is larger than the sum of its proper divisors (1).

120849109 is an equidigital number, since it uses as much as digits as its factorization.

120849109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 120849109 is about 10993.1391785968. The cubic root of 120849109 is about 494.4030609849.

The spelling of 120849109 in words is "one hundred twenty million, eight hundred forty-nine thousand, one hundred nine".