93449981 has 2 divisors, whose sum is σ = 93449982. Its totient is φ = 93449980.

The previous prime is 93449963. The next prime is 93450013. The reversal of 93449981 is 18994439.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47141956 + 46308025 = 6866^2 + 6805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-93449981 is a prime.

It is a super-2 number, since 2×93449981² = 17465797897800722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (93440981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46724990 + 46724991.

It is an arithmetic number, because the mean of its divisors is an integer number (46724991).

Almost surely, 2^93449981 is an apocalyptic number.

It is an amenable number.

93449981 is a deficient number, since it is larger than the sum of its proper divisors (1).

93449981 is an equidigital number, since it uses as much as digits as its factorization.

93449981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 47.

The square root of 93449981 is about 9666.9530359881. The cubic root of 93449981 is about 453.7950341711.

The spelling of 93449981 in words is "ninety-three million, four hundred forty-nine thousand, nine hundred eighty-one".