99904193 has 2 divisors, whose sum is σ = 99904194. Its totient is φ = 99904192.

The previous prime is 99904183. The next prime is 99904199. The reversal of 99904193 is 39140999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99361024 + 543169 = 9968^2 + 737^2 .

It is a cyclic number.

It is not a de Polignac number, because 99904193 - 2¹⁶ = 99838657 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (99904199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49952096 + 49952097.

It is an arithmetic number, because the mean of its divisors is an integer number (49952097).

Almost surely, 2^99904193 is an apocalyptic number.

It is an amenable number.

99904193 is a deficient number, since it is larger than the sum of its proper divisors (1).

99904193 is an equidigital number, since it uses as much as digits as its factorization.

99904193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78732, while the sum is 44.

The square root of 99904193 is about 9995.2085020774. The cubic root of 99904193 is about 464.0106037633.

The spelling of 99904193 in words is "ninety-nine million, nine hundred four thousand, one hundred ninety-three".