121942693 has 2 divisors, whose sum is σ = 121942694. Its totient is φ = 121942692.

The previous prime is 121942669. The next prime is 121942697. The reversal of 121942693 is 396249121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90212004 + 31730689 = 9498^2 + 5633^2 .

It is an emirp because it is prime and its reverse (396249121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121942693 - 2⁵ = 121942661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121942697) 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, 60971346 + 60971347.

It is an arithmetic number, because the mean of its divisors is an integer number (60971347).

Almost surely, 2^121942693 is an apocalyptic number.

It is an amenable number.

121942693 is a deficient number, since it is larger than the sum of its proper divisors (1).

121942693 is an equidigital number, since it uses as much as digits as its factorization.

121942693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 37.

The square root of 121942693 is about 11042.7665464774. The cubic root of 121942693 is about 495.8898973548.

The spelling of 121942693 in words is "one hundred twenty-one million, nine hundred forty-two thousand, six hundred ninety-three".