73837721 has 2 divisors, whose sum is σ = 73837722. Its totient is φ = 73837720.

The previous prime is 73837717. The next prime is 73837763. The reversal of 73837721 is 12773837.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52345225 + 21492496 = 7235^2 + 4636^2 .

It is a cyclic number.

It is not a de Polignac number, because 73837721 - 2² = 73837717 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (73837121) 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, 36918860 + 36918861.

It is an arithmetic number, because the mean of its divisors is an integer number (36918861).

Almost surely, 2^73837721 is an apocalyptic number.

It is an amenable number.

73837721 is a deficient number, since it is larger than the sum of its proper divisors (1).

73837721 is an equidigital number, since it uses as much as digits as its factorization.

73837721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49392, while the sum is 38.

The square root of 73837721 is about 8592.8878149316. The cubic root of 73837721 is about 419.5265280514.

The spelling of 73837721 in words is "seventy-three million, eight hundred thirty-seven thousand, seven hundred twenty-one".