93839021 has 2 divisors, whose sum is σ = 93839022. Its totient is φ = 93839020.

The previous prime is 93839017. The next prime is 93839023. The reversal of 93839021 is 12093839.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93334921 + 504100 = 9661^2 + 710^2 .

It is an emirp because it is prime and its reverse (12093839) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 93839021 - 2² = 93839017 is a prime.

Together with 93839023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (93839023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46919510 + 46919511.

It is an arithmetic number, because the mean of its divisors is an integer number (46919511).

Almost surely, 2^93839021 is an apocalyptic number.

It is an amenable number.

93839021 is a deficient number, since it is larger than the sum of its proper divisors (1).

93839021 is an equidigital number, since it uses as much as digits as its factorization.

93839021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 93839021 is about 9687.0542994246. The cubic root of 93839021 is about 454.4238910690.

The spelling of 93839021 in words is "ninety-three million, eight hundred thirty-nine thousand, twenty-one".