120961609 has 2 divisors, whose sum is σ = 120961610. Its totient is φ = 120961608.

The previous prime is 120961559. The next prime is 120961651. The reversal of 120961609 is 906169021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109265209 + 11696400 = 10453^2 + 3420^2 .

It is an emirp because it is prime and its reverse (906169021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120961609 - 2⁹ = 120961097 is a prime.

It is not a weakly prime, because it can be changed into another prime (120961679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60480804 + 60480805.

It is an arithmetic number, because the mean of its divisors is an integer number (60480805).

Almost surely, 2^120961609 is an apocalyptic number.

It is an amenable number.

120961609 is a deficient number, since it is larger than the sum of its proper divisors (1).

120961609 is an equidigital number, since it uses as much as digits as its factorization.

120961609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 120961609 is about 10998.2548161061. The cubic root of 120961609 is about 494.5564288073.

The spelling of 120961609 in words is "one hundred twenty million, nine hundred sixty-one thousand, six hundred nine".