121779373 has 2 divisors, whose sum is σ = 121779374. Its totient is φ = 121779372.

The previous prime is 121779349. The next prime is 121779391. The reversal of 121779373 is 373977121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68591524 + 53187849 = 8282^2 + 7293^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121779373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121779673) 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, 60889686 + 60889687.

It is an arithmetic number, because the mean of its divisors is an integer number (60889687).

Almost surely, 2^121779373 is an apocalyptic number.

It is an amenable number.

121779373 is a deficient number, since it is larger than the sum of its proper divisors (1).

121779373 is an equidigital number, since it uses as much as digits as its factorization.

121779373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55566, while the sum is 40.

The square root of 121779373 is about 11035.3691827686. The cubic root of 121779373 is about 495.6684137504.

The spelling of 121779373 in words is "one hundred twenty-one million, seven hundred seventy-nine thousand, three hundred seventy-three".