121146689 has 2 divisors, whose sum is σ = 121146690. Its totient is φ = 121146688.

The previous prime is 121146637. The next prime is 121146691. The reversal of 121146689 is 986641121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121000000 + 146689 = 11000^2 + 383^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121146689 is a prime.

It is a Sophie Germain prime.

Together with 121146691, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (121146989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60573344 + 60573345.

It is an arithmetic number, because the mean of its divisors is an integer number (60573345).

Almost surely, 2^121146689 is an apocalyptic number.

It is an amenable number.

121146689 is a deficient number, since it is larger than the sum of its proper divisors (1).

121146689 is an equidigital number, since it uses as much as digits as its factorization.

121146689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 38.

The square root of 121146689 is about 11006.6656622249. The cubic root of 121146689 is about 494.8085359578.

It can be divided in two parts, 121 and 146689, that multiplied together give a square (17749369 = 4213²).

The spelling of 121146689 in words is "one hundred twenty-one million, one hundred forty-six thousand, six hundred eighty-nine".