121607009 has 2 divisors, whose sum is σ = 121607010. Its totient is φ = 121607008.

The previous prime is 121606999. The next prime is 121607021. The reversal of 121607009 is 900706121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102070609 + 19536400 = 10103^2 + 4420^2 .

It is a cyclic number.

It is not a de Polignac number, because 121607009 - 2⁴ = 121606993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121607089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60803504 + 60803505.

It is an arithmetic number, because the mean of its divisors is an integer number (60803505).

Almost surely, 2^121607009 is an apocalyptic number.

It is an amenable number.

121607009 is a deficient number, since it is larger than the sum of its proper divisors (1).

121607009 is an equidigital number, since it uses as much as digits as its factorization.

121607009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 121607009 is about 11027.5568010326. The cubic root of 121607009 is about 495.4344504010.

The spelling of 121607009 in words is "one hundred twenty-one million, six hundred seven thousand, nine".