93996821 has 2 divisors, whose sum is σ = 93996822. Its totient is φ = 93996820.

The previous prime is 93996817. The next prime is 93996827. The reversal of 93996821 is 12869939.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88642225 + 5354596 = 9415^2 + 2314^2 .

It is a cyclic number.

It is not a de Polignac number, because 93996821 - 2² = 93996817 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (93996827) 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, 46998410 + 46998411.

It is an arithmetic number, because the mean of its divisors is an integer number (46998411).

Almost surely, 2^93996821 is an apocalyptic number.

It is an amenable number.

93996821 is a deficient number, since it is larger than the sum of its proper divisors (1).

93996821 is an equidigital number, since it uses as much as digits as its factorization.

93996821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209952, while the sum is 47.

The square root of 93996821 is about 9695.1957690394. The cubic root of 93996821 is about 454.6784686491.

The spelling of 93996821 in words is "ninety-three million, nine hundred ninety-six thousand, eight hundred twenty-one".