121028693 has 2 divisors, whose sum is σ = 121028694. Its totient is φ = 121028692.

The previous prime is 121028683. The next prime is 121028701. The reversal of 121028693 is 396820121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87179569 + 33849124 = 9337^2 + 5818^2 .

It is an emirp because it is prime and its reverse (396820121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121028693 - 2¹⁸ = 120766549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121028623) 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, 60514346 + 60514347.

It is an arithmetic number, because the mean of its divisors is an integer number (60514347).

Almost surely, 2^121028693 is an apocalyptic number.

It is an amenable number.

121028693 is a deficient number, since it is larger than the sum of its proper divisors (1).

121028693 is an equidigital number, since it uses as much as digits as its factorization.

121028693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 121028693 is about 11001.3041499633. The cubic root of 121028693 is about 494.6478371267.

The spelling of 121028693 in words is "one hundred twenty-one million, twenty-eight thousand, six hundred ninety-three".