121814689 has 2 divisors, whose sum is σ = 121814690. Its totient is φ = 121814688.

The previous prime is 121814597. The next prime is 121814807. The reversal of 121814689 is 986418121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105678400 + 16136289 = 10280^2 + 4017^2 .

It is a cyclic number.

It is not a de Polignac number, because 121814689 - 2¹³ = 121806497 is a prime.

It is not a weakly prime, because it can be changed into another prime (121874689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60907344 + 60907345.

It is an arithmetic number, because the mean of its divisors is an integer number (60907345).

Almost surely, 2^121814689 is an apocalyptic number.

It is an amenable number.

121814689 is a deficient number, since it is larger than the sum of its proper divisors (1).

121814689 is an equidigital number, since it uses as much as digits as its factorization.

121814689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 40.

The square root of 121814689 is about 11036.9691944845. The cubic root of 121814689 is about 495.7163237081.

The spelling of 121814689 in words is "one hundred twenty-one million, eight hundred fourteen thousand, six hundred eighty-nine".