121775497 has 2 divisors, whose sum is σ = 121775498. Its totient is φ = 121775496.

The previous prime is 121775477. The next prime is 121775531. The reversal of 121775497 is 794577121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62346816 + 59428681 = 7896^2 + 7709^2 .

It is a cyclic number.

It is not a de Polignac number, because 121775497 - 2¹⁹ = 121251209 is a prime.

It is equal to p_6936991 and since 121775497 and 6936991 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (121775447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60887748 + 60887749.

It is an arithmetic number, because the mean of its divisors is an integer number (60887749).

Almost surely, 2^121775497 is an apocalyptic number.

It is an amenable number.

121775497 is a deficient number, since it is larger than the sum of its proper divisors (1).

121775497 is an equidigital number, since it uses as much as digits as its factorization.

121775497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 123480, while the sum is 43.

The square root of 121775497 is about 11035.1935642289. The cubic root of 121775497 is about 495.6631549749.

The spelling of 121775497 in words is "one hundred twenty-one million, seven hundred seventy-five thousand, four hundred ninety-seven".