120809749 has 2 divisors, whose sum is σ = 120809750. Its totient is φ = 120809748.

The previous prime is 120809743. The next prime is 120809797. The reversal of 120809749 is 947908021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116251524 + 4558225 = 10782^2 + 2135^2 .

It is a cyclic number.

It is not a de Polignac number, because 120809749 - 2⁹ = 120809237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120809743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60404874 + 60404875.

It is an arithmetic number, because the mean of its divisors is an integer number (60404875).

Almost surely, 2^120809749 is an apocalyptic number.

It is an amenable number.

120809749 is a deficient number, since it is larger than the sum of its proper divisors (1).

120809749 is an equidigital number, since it uses as much as digits as its factorization.

120809749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 120809749 is about 10991.3488253262. The cubic root of 120809749 is about 494.3493802209.

The spelling of 120809749 in words is "one hundred twenty million, eight hundred nine thousand, seven hundred forty-nine".