99953993 has 2 divisors, whose sum is σ = 99953994. Its totient is φ = 99953992.

The previous prime is 99953989. The next prime is 99954011. The reversal of 99953993 is 39935999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88209664 + 11744329 = 9392^2 + 3427^2 .

It is a cyclic number.

It is not a de Polignac number, because 99953993 - 2² = 99953989 is a prime.

It is not a weakly prime, because it can be changed into another prime (99953933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49976996 + 49976997.

It is an arithmetic number, because the mean of its divisors is an integer number (49976997).

Almost surely, 2^99953993 is an apocalyptic number.

It is an amenable number.

99953993 is a deficient number, since it is larger than the sum of its proper divisors (1).

99953993 is an equidigital number, since it uses as much as digits as its factorization.

99953993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2657205, while the sum is 56.

The square root of 99953993 is about 9997.6993853586. The cubic root of 99953993 is about 464.0876905831.

The spelling of 99953993 in words is "ninety-nine million, nine hundred fifty-three thousand, nine hundred ninety-three".