9993070181 has 2 divisors, whose sum is σ = 9993070182. Its totient is φ = 9993070180.

The previous prime is 9993070127. The next prime is 9993070231. The reversal of 9993070181 is 1810703999.

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., 9955050625 + 38019556 = 99775^2 + 6166^2 .

It is a cyclic number.

It is not a de Polignac number, because 9993070181 - 2⁶ = 9993070117 is a prime.

It is a super-2 number, since 2×9993070181² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9993070481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4996535090 + 4996535091.

It is an arithmetic number, because the mean of its divisors is an integer number (4996535091).

Almost surely, 2^9993070181 is an apocalyptic number.

It is an amenable number.

9993070181 is a deficient number, since it is larger than the sum of its proper divisors (1).

9993070181 is an equidigital number, since it uses as much as digits as its factorization.

9993070181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 47.

The square root of 9993070181 is about 99965.3449001203. The cubic root of 9993070181 is about 2153.9369136158.

The spelling of 9993070181 in words is "nine billion, nine hundred ninety-three million, seventy thousand, one hundred eighty-one".