99660013 has 2 divisors, whose sum is σ = 99660014. Its totient is φ = 99660012.

The previous prime is 99659983. The next prime is 99660049. The reversal of 99660013 is 31006699.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77211369 + 22448644 = 8787^2 + 4738^2 .

It is a cyclic number.

It is not a de Polignac number, because 99660013 - 2⁹ = 99659501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99660313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49830006 + 49830007.

It is an arithmetic number, because the mean of its divisors is an integer number (49830007).

Almost surely, 2^99660013 is an apocalyptic number.

It is an amenable number.

99660013 is a deficient number, since it is larger than the sum of its proper divisors (1).

99660013 is an equidigital number, since it uses as much as digits as its factorization.

99660013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 99660013 is about 9982.9861764905. The cubic root of 99660013 is about 463.6322594711.

It can be divided in two parts, 996 and 60013, that added together give a square (61009 = 247²).

The spelling of 99660013 in words is "ninety-nine million, six hundred sixty thousand, thirteen".