73583821 has 2 divisors, whose sum is σ = 73583822. Its totient is φ = 73583820.

The previous prime is 73583813. The next prime is 73583843. The reversal of 73583821 is 12838537.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39816100 + 33767721 = 6310^2 + 5811^2 .

It is an emirp because it is prime and its reverse (12838537) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73583821 - 2³ = 73583813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73583891) 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, 36791910 + 36791911.

It is an arithmetic number, because the mean of its divisors is an integer number (36791911).

Almost surely, 2^73583821 is an apocalyptic number.

It is an amenable number.

73583821 is a deficient number, since it is larger than the sum of its proper divisors (1).

73583821 is an equidigital number, since it uses as much as digits as its factorization.

73583821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 37.

The square root of 73583821 is about 8578.1012467795. The cubic root of 73583821 is about 419.0451114653.

The spelling of 73583821 in words is "seventy-three million, five hundred eighty-three thousand, eight hundred twenty-one".