99137321 has 2 divisors, whose sum is σ = 99137322. Its totient is φ = 99137320.

The previous prime is 99137309. The next prime is 99137333. The reversal of 99137321 is 12373199.

It is a balanced prime because it is at equal distance from previous prime (99137309) and next prime (99137333).

It can be written as a sum of positive squares in only one way, i.e., 49632025 + 49505296 = 7045^2 + 7036^2 .

It is a cyclic number.

It is not a de Polignac number, because 99137321 - 2¹⁴ = 99120937 is a prime.

It is a super-3 number, since 3×99137321³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99137351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49568660 + 49568661.

It is an arithmetic number, because the mean of its divisors is an integer number (49568661).

Almost surely, 2^99137321 is an apocalyptic number.

It is an amenable number.

99137321 is a deficient number, since it is larger than the sum of its proper divisors (1).

99137321 is an equidigital number, since it uses as much as digits as its factorization.

99137321 is an odious number, because the sum of its binary digits is odd.

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

The square root of 99137321 is about 9956.7726196795. The cubic root of 99137321 is about 462.8202929661.

The spelling of 99137321 in words is "ninety-nine million, one hundred thirty-seven thousand, three hundred twenty-one".