120910909 has 4 divisors (see below), whose sum is σ = 138183904. Its totient is φ = 103637916.

The previous prime is 120910903. The next prime is 120910949. The reversal of 120910909 is 909019021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 120910909 - 2⁵ = 120910877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120910903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8636487 + ... + 8636500.

It is an arithmetic number, because the mean of its divisors is an integer number (34545976).

Almost surely, 2^120910909 is an apocalyptic number.

It is an amenable number.

120910909 is a deficient number, since it is larger than the sum of its proper divisors (17272995).

120910909 is an equidigital number, since it uses as much as digits as its factorization.

120910909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17272994.

The product of its (nonzero) digits is 1458, while the sum is 31.

The square root of 120910909 is about 10995.9496633988. The cubic root of 120910909 is about 494.4873228181.

The spelling of 120910909 in words is "one hundred twenty million, nine hundred ten thousand, nine hundred nine".