93660421 has 2 divisors, whose sum is σ = 93660422. Its totient is φ = 93660420.

The previous prime is 93660419. The next prime is 93660433. The reversal of 93660421 is 12406639.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92736900 + 923521 = 9630^2 + 961^2 .

It is a cyclic number.

It is not a de Polignac number, because 93660421 - 2¹ = 93660419 is a prime.

Together with 93660419, it forms a pair of twin primes.

It is equal to p_5416636 and since 93660421 and 5416636 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (93666421) 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, 46830210 + 46830211.

It is an arithmetic number, because the mean of its divisors is an integer number (46830211).

Almost surely, 2^93660421 is an apocalyptic number.

It is an amenable number.

93660421 is a deficient number, since it is larger than the sum of its proper divisors (1).

93660421 is an equidigital number, since it uses as much as digits as its factorization.

93660421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 93660421 is about 9677.8314203131. The cubic root of 93660421 is about 454.1354124589.

The spelling of 93660421 in words is "ninety-three million, six hundred sixty thousand, four hundred twenty-one".