99713321 has 2 divisors, whose sum is σ = 99713322. Its totient is φ = 99713320.

The previous prime is 99713249. The next prime is 99713351. The reversal of 99713321 is 12331799.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88153321 + 11560000 = 9389^2 + 3400^2 .

It is an emirp because it is prime and its reverse (12331799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99713321 - 2¹⁰ = 99712297 is a prime.

It is not a weakly prime, because it can be changed into another prime (99713351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49856660 + 49856661.

It is an arithmetic number, because the mean of its divisors is an integer number (49856661).

Almost surely, 2^99713321 is an apocalyptic number.

It is an amenable number.

99713321 is a deficient number, since it is larger than the sum of its proper divisors (1).

99713321 is an equidigital number, since it uses as much as digits as its factorization.

99713321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10206, while the sum is 35.

The square root of 99713321 is about 9985.6557621420. The cubic root of 99713321 is about 463.7149101495.

The spelling of 99713321 in words is "ninety-nine million, seven hundred thirteen thousand, three hundred twenty-one".