93516421 has 2 divisors, whose sum is σ = 93516422. Its totient is φ = 93516420.

The previous prime is 93516419. The next prime is 93516463. The reversal of 93516421 is 12461539.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79744900 + 13771521 = 8930^2 + 3711^2 .

It is a cyclic number.

It is not a de Polignac number, because 93516421 - 2¹ = 93516419 is a prime.

Together with 93516419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (93519421) 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, 46758210 + 46758211.

It is an arithmetic number, because the mean of its divisors is an integer number (46758211).

Almost surely, 2^93516421 is an apocalyptic number.

It is an amenable number.

93516421 is a deficient number, since it is larger than the sum of its proper divisors (1).

93516421 is an equidigital number, since it uses as much as digits as its factorization.

93516421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 31.

The square root of 93516421 is about 9670.3888753245. The cubic root of 93516421 is about 453.9025533641.

The spelling of 93516421 in words is "ninety-three million, five hundred sixteen thousand, four hundred twenty-one".