121907449 has 2 divisors, whose sum is σ = 121907450. Its totient is φ = 121907448.

The previous prime is 121907431. The next prime is 121907557. The reversal of 121907449 is 944709121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79566400 + 42341049 = 8920^2 + 6507^2 .

It is a cyclic number.

It is not a de Polignac number, because 121907449 - 2⁷ = 121907321 is a prime.

It is a super-2 number, since 2×121907449² = 29722852243375202, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121907749) 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, 60953724 + 60953725.

It is an arithmetic number, because the mean of its divisors is an integer number (60953725).

Almost surely, 2^121907449 is an apocalyptic number.

It is an amenable number.

121907449 is a deficient number, since it is larger than the sum of its proper divisors (1).

121907449 is an equidigital number, since it uses as much as digits as its factorization.

121907449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 121907449 is about 11041.1706353991. The cubic root of 121907449 is about 495.8421185522.

The spelling of 121907449 in words is "one hundred twenty-one million, nine hundred seven thousand, four hundred forty-nine".