121549793 has 2 divisors, whose sum is σ = 121549794. Its totient is φ = 121549792.

The previous prime is 121549787. The next prime is 121549811. The reversal of 121549793 is 397945121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121506529 + 43264 = 11023^2 + 208^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121549793 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121549793.

It is not a weakly prime, because it can be changed into another prime (121569793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60774896 + 60774897.

It is an arithmetic number, because the mean of its divisors is an integer number (60774897).

Almost surely, 2^121549793 is an apocalyptic number.

It is an amenable number.

121549793 is a deficient number, since it is larger than the sum of its proper divisors (1).

121549793 is an equidigital number, since it uses as much as digits as its factorization.

121549793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 41.

The square root of 121549793 is about 11024.9622675091. The cubic root of 121549793 is about 495.3567377082.

The spelling of 121549793 in words is "one hundred twenty-one million, five hundred forty-nine thousand, seven hundred ninety-three".