99840313 has 2 divisors, whose sum is σ = 99840314. Its totient is φ = 99840312.

The previous prime is 99840283. The next prime is 99840329. The reversal of 99840313 is 31304899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98168464 + 1671849 = 9908^2 + 1293^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99840313 is a prime.

It is not a weakly prime, because it can be changed into another prime (99840343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49920156 + 49920157.

It is an arithmetic number, because the mean of its divisors is an integer number (49920157).

Almost surely, 2^99840313 is an apocalyptic number.

It is an amenable number.

99840313 is a deficient number, since it is larger than the sum of its proper divisors (1).

99840313 is an equidigital number, since it uses as much as digits as its factorization.

99840313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 99840313 is about 9992.0124599602. The cubic root of 99840313 is about 463.9116846011.

The spelling of 99840313 in words is "ninety-nine million, eight hundred forty thousand, three hundred thirteen".