99307993 has 2 divisors, whose sum is σ = 99307994. Its totient is φ = 99307992.

The previous prime is 99307991. The next prime is 99308021. The reversal of 99307993 is 39970399.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78623689 + 20684304 = 8867^2 + 4548^2 .

It is a cyclic number.

It is not a de Polignac number, because 99307993 - 2¹ = 99307991 is a prime.

Together with 99307991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (99307991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49653996 + 49653997.

It is an arithmetic number, because the mean of its divisors is an integer number (49653997).

Almost surely, 2^99307993 is an apocalyptic number.

It is an amenable number.

99307993 is a deficient number, since it is larger than the sum of its proper divisors (1).

99307993 is an equidigital number, since it uses as much as digits as its factorization.

99307993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 413343, while the sum is 49.

The square root of 99307993 is about 9965.3395827739. The cubic root of 99307993 is about 463.0857334626.

The spelling of 99307993 in words is "ninety-nine million, three hundred seven thousand, nine hundred ninety-three".