93071921 has 2 divisors, whose sum is σ = 93071922. Its totient is φ = 93071920.

The previous prime is 93071903. The next prime is 93071941. The reversal of 93071921 is 12917039.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53129521 + 39942400 = 7289^2 + 6320^2 .

It is an emirp because it is prime and its reverse (12917039) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 93071921 - 2¹⁸ = 92809777 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (93071941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46535960 + 46535961.

It is an arithmetic number, because the mean of its divisors is an integer number (46535961).

Almost surely, 2^93071921 is an apocalyptic number.

It is an amenable number.

93071921 is a deficient number, since it is larger than the sum of its proper divisors (1).

93071921 is an equidigital number, since it uses as much as digits as its factorization.

93071921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 93071921 is about 9647.3789704769. The cubic root of 93071921 is about 453.1822513535.

The spelling of 93071921 in words is "ninety-three million, seventy-one thousand, nine hundred twenty-one".