93641221 has 2 divisors, whose sum is σ = 93641222. Its totient is φ = 93641220.

The previous prime is 93641213. The next prime is 93641227. The reversal of 93641221 is 12214639.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86750596 + 6890625 = 9314^2 + 2625^2 .

It is an emirp because it is prime and its reverse (12214639) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 93641221 - 2³ = 93641213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 93641221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (93641227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46820610 + 46820611.

It is an arithmetic number, because the mean of its divisors is an integer number (46820611).

Almost surely, 2^93641221 is an apocalyptic number.

It is an amenable number.

93641221 is a deficient number, since it is larger than the sum of its proper divisors (1).

93641221 is an equidigital number, since it uses as much as digits as its factorization.

93641221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 28.

The square root of 93641221 is about 9676.8394117088. The cubic root of 93641221 is about 454.1043783761.

It can be divided in two parts, 9364 and 1221, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 93641221 in words is "ninety-three million, six hundred forty-one thousand, two hundred twenty-one".