93169981 has 2 divisors, whose sum is σ = 93169982. Its totient is φ = 93169980.

The previous prime is 93169957. The next prime is 93170003. The reversal of 93169981 is 18996139.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91584900 + 1585081 = 9570^2 + 1259^2 .

It is a cyclic number.

It is not a de Polignac number, because 93169981 - 2¹¹ = 93167933 is a prime.

It is a super-2 number, since 2×93169981² = 17361290719080722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (93169081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46584990 + 46584991.

It is an arithmetic number, because the mean of its divisors is an integer number (46584991).

Almost surely, 2^93169981 is an apocalyptic number.

It is an amenable number.

93169981 is a deficient number, since it is larger than the sum of its proper divisors (1).

93169981 is an equidigital number, since it uses as much as digits as its factorization.

93169981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 46.

The square root of 93169981 is about 9652.4598419263. The cubic root of 93169981 is about 453.3413521626.

The spelling of 93169981 in words is "ninety-three million, one hundred sixty-nine thousand, nine hundred eighty-one".