73068542021 has 2 divisors, whose sum is σ = 73068542022. Its totient is φ = 73068542020.

The previous prime is 73068541999. The next prime is 73068542023. The reversal of 73068542021 is 12024586037.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38578852225 + 34489689796 = 196415^2 + 185714^2 .

It is a cyclic number.

It is not a de Polignac number, because 73068542021 - 2¹⁰ = 73068540997 is a prime.

Together with 73068542023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73068542023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36534271010 + 36534271011.

It is an arithmetic number, because the mean of its divisors is an integer number (36534271011).

Almost surely, 2^73068542021 is an apocalyptic number.

It is an amenable number.

73068542021 is a deficient number, since it is larger than the sum of its proper divisors (1).

73068542021 is an equidigital number, since it uses as much as digits as its factorization.

73068542021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 73068542021 in words is "seventy-three billion, sixty-eight million, five hundred forty-two thousand, twenty-one".