121660589 has 2 divisors, whose sum is σ = 121660590. Its totient is φ = 121660588.

The previous prime is 121660579. The next prime is 121660633. The reversal of 121660589 is 985066121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121110025 + 550564 = 11005^2 + 742^2 .

It is a cyclic number.

It is not a de Polignac number, because 121660589 - 2⁴ = 121660573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121660579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60830294 + 60830295.

It is an arithmetic number, because the mean of its divisors is an integer number (60830295).

Almost surely, 2^121660589 is an apocalyptic number.

It is an amenable number.

121660589 is a deficient number, since it is larger than the sum of its proper divisors (1).

121660589 is an equidigital number, since it uses as much as digits as its factorization.

121660589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 121660589 is about 11029.9859020762. The cubic root of 121660589 is about 495.5072024580.

The spelling of 121660589 in words is "one hundred twenty-one million, six hundred sixty thousand, five hundred eighty-nine".