121404709 has 2 divisors, whose sum is σ = 121404710. Its totient is φ = 121404708.

The previous prime is 121404683. The next prime is 121404739. The reversal of 121404709 is 907404121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106543684 + 14861025 = 10322^2 + 3855^2 .

It is a cyclic number.

It is not a de Polignac number, because 121404709 - 2⁷ = 121404581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121404739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60702354 + 60702355.

It is an arithmetic number, because the mean of its divisors is an integer number (60702355).

Almost surely, 2^121404709 is an apocalyptic number.

It is an amenable number.

121404709 is a deficient number, since it is larger than the sum of its proper divisors (1).

121404709 is an equidigital number, since it uses as much as digits as its factorization.

121404709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 121404709 is about 11018.3805071344. The cubic root of 121404709 is about 495.1595703620.

The spelling of 121404709 in words is "one hundred twenty-one million, four hundred four thousand, seven hundred nine".