93187493221 has 2 divisors, whose sum is σ = 93187493222. Its totient is φ = 93187493220.

The previous prime is 93187493173. The next prime is 93187493261. The reversal of 93187493221 is 12239478139.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89994000100 + 3193493121 = 299990^2 + 56511^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-93187493221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (93187493261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46593746610 + 46593746611.

It is an arithmetic number, because the mean of its divisors is an integer number (46593746611).

Almost surely, 2^93187493221 is an apocalyptic number.

It is an amenable number.

93187493221 is a deficient number, since it is larger than the sum of its proper divisors (1).

93187493221 is an equidigital number, since it uses as much as digits as its factorization.

93187493221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 49.

The spelling of 93187493221 in words is "ninety-three billion, one hundred eighty-seven million, four hundred ninety-three thousand, two hundred twenty-one".