93872021 has 2 divisors, whose sum is σ = 93872022. Its totient is φ = 93872020.

The previous prime is 93872017. The next prime is 93872057. The reversal of 93872021 is 12027839.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72063121 + 21808900 = 8489^2 + 4670^2 .

It is a cyclic number.

It is not a de Polignac number, because 93872021 - 2² = 93872017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (93872221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46936010 + 46936011.

It is an arithmetic number, because the mean of its divisors is an integer number (46936011).

Almost surely, 2^93872021 is an apocalyptic number.

It is an amenable number.

93872021 is a deficient number, since it is larger than the sum of its proper divisors (1).

93872021 is an equidigital number, since it uses as much as digits as its factorization.

93872021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 93872021 is about 9688.7574538741. The cubic root of 93872021 is about 454.4771533144.

The spelling of 93872021 in words is "ninety-three million, eight hundred seventy-two thousand, twenty-one".