99918323 has 2 divisors, whose sum is σ = 99918324. Its totient is φ = 99918322.

The previous prime is 99918293. The next prime is 99918349. The reversal of 99918323 is 32381999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99918323 - 2⁸ = 99918067 is a prime.

It is a super-2 number, since 2×99918323² = 19967342542264658, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (99998323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49959161 + 49959162.

It is an arithmetic number, because the mean of its divisors is an integer number (49959162).

Almost surely, 2^99918323 is an apocalyptic number.

99918323 is a deficient number, since it is larger than the sum of its proper divisors (1).

99918323 is an equidigital number, since it uses as much as digits as its factorization.

99918323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104976, while the sum is 44.

The square root of 99918323 is about 9995.9153157677. The cubic root of 99918323 is about 464.0324785901.

The spelling of 99918323 in words is "ninety-nine million, nine hundred eighteen thousand, three hundred twenty-three".