93631621 has 2 divisors, whose sum is σ = 93631622. Its totient is φ = 93631620.

The previous prime is 93631619. The next prime is 93631667. The reversal of 93631621 is 12613639.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89094721 + 4536900 = 9439^2 + 2130^2 .

It is an emirp because it is prime and its reverse (12613639) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 93631621 - 2¹ = 93631619 is a prime.

Together with 93631619, it forms a pair of twin primes.

It is equal to p_5415079 and since 93631621 and 5415079 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 (93631721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46815810 + 46815811.

It is an arithmetic number, because the mean of its divisors is an integer number (46815811).

Almost surely, 2^93631621 is an apocalyptic number.

It is an amenable number.

93631621 is a deficient number, since it is larger than the sum of its proper divisors (1).

93631621 is an equidigital number, since it uses as much as digits as its factorization.

93631621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 31.

The square root of 93631621 is about 9676.3433692692. The cubic root of 93631621 is about 454.0888597438.

The spelling of 93631621 in words is "ninety-three million, six hundred thirty-one thousand, six hundred twenty-one".