121633489 has 2 divisors, whose sum is σ = 121633490. Its totient is φ = 121633488.

The previous prime is 121633469. The next prime is 121633507. The reversal of 121633489 is 984336121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87609600 + 34023889 = 9360^2 + 5833^2 .

It is a cyclic number.

It is not a de Polignac number, because 121633489 - 2¹³ = 121625297 is a prime.

It is not a weakly prime, because it can be changed into another prime (121633469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60816744 + 60816745.

It is an arithmetic number, because the mean of its divisors is an integer number (60816745).

Almost surely, 2^121633489 is an apocalyptic number.

It is an amenable number.

121633489 is a deficient number, since it is larger than the sum of its proper divisors (1).

121633489 is an equidigital number, since it uses as much as digits as its factorization.

121633489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 37.

The square root of 121633489 is about 11028.7573642727. The cubic root of 121633489 is about 495.4704081752.

The spelling of 121633489 in words is "one hundred twenty-one million, six hundred thirty-three thousand, four hundred eighty-nine".