121277489 has 2 divisors, whose sum is σ = 121277490. Its totient is φ = 121277488.

The previous prime is 121277483. The next prime is 121277503. The reversal of 121277489 is 984772121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110986225 + 10291264 = 10535^2 + 3208^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121277489 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121277483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60638744 + 60638745.

It is an arithmetic number, because the mean of its divisors is an integer number (60638745).

Almost surely, 2^121277489 is an apocalyptic number.

It is an amenable number.

121277489 is a deficient number, since it is larger than the sum of its proper divisors (1).

121277489 is an equidigital number, since it uses as much as digits as its factorization.

121277489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 41.

The square root of 121277489 is about 11012.6059132251. The cubic root of 121277489 is about 494.9865506668.

The spelling of 121277489 in words is "one hundred twenty-one million, two hundred seventy-seven thousand, four hundred eighty-nine".