121667449 has 2 divisors, whose sum is σ = 121667450. Its totient is φ = 121667448.

The previous prime is 121667423. The next prime is 121667479. The reversal of 121667449 is 944766121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110565225 + 11102224 = 10515^2 + 3332^2 .

It is a cyclic number.

It is not a de Polignac number, because 121667449 - 2⁷ = 121667321 is a prime.

It is not a weakly prime, because it can be changed into another prime (121667479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60833724 + 60833725.

It is an arithmetic number, because the mean of its divisors is an integer number (60833725).

Almost surely, 2^121667449 is an apocalyptic number.

It is an amenable number.

121667449 is a deficient number, since it is larger than the sum of its proper divisors (1).

121667449 is an equidigital number, since it uses as much as digits as its factorization.

121667449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 40.

The square root of 121667449 is about 11030.2968681718. The cubic root of 121667449 is about 495.5165155685.

The spelling of 121667449 in words is "one hundred twenty-one million, six hundred sixty-seven thousand, four hundred forty-nine".