120986809 has 2 divisors, whose sum is σ = 120986810. Its totient is φ = 120986808.

The previous prime is 120986797. The next prime is 120986837. The reversal of 120986809 is 908689021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120560400 + 426409 = 10980^2 + 653^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120986809 is a prime.

It is not a weakly prime, because it can be changed into another prime (120986009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60493404 + 60493405.

It is an arithmetic number, because the mean of its divisors is an integer number (60493405).

Almost surely, 2^120986809 is an apocalyptic number.

It is an amenable number.

120986809 is a deficient number, since it is larger than the sum of its proper divisors (1).

120986809 is an equidigital number, since it uses as much as digits as its factorization.

120986809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 120986809 is about 10999.4003927487. The cubic root of 120986809 is about 494.5907701622.

The spelling of 120986809 in words is "one hundred twenty million, nine hundred eighty-six thousand, eight hundred nine".