93443987881 has 2 divisors, whose sum is σ = 93443987882. Its totient is φ = 93443987880.

The previous prime is 93443987809. The next prime is 93443987893. The reversal of 93443987881 is 18878934439.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50048848656 + 43395139225 = 223716^2 + 208315^2 .

It is a cyclic number.

It is not a de Polignac number, because 93443987881 - 2¹⁵ = 93443955113 is a prime.

It is a super-2 number, since 2×93443987881² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (93443982881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46721993940 + 46721993941.

It is an arithmetic number, because the mean of its divisors is an integer number (46721993941).

Almost surely, 2^93443987881 is an apocalyptic number.

It is an amenable number.

93443987881 is a deficient number, since it is larger than the sum of its proper divisors (1).

93443987881 is an equidigital number, since it uses as much as digits as its factorization.

93443987881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41803776, while the sum is 64.

The spelling of 93443987881 in words is "ninety-three billion, four hundred forty-three million, nine hundred eighty-seven thousand, eight hundred eighty-one".