99145993 has 2 divisors, whose sum is σ = 99145994. Its totient is φ = 99145992.

The previous prime is 99145961. The next prime is 99146017. The reversal of 99145993 is 39954199.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72386064 + 26759929 = 8508^2 + 5173^2 .

It is a cyclic number.

It is not a de Polignac number, because 99145993 - 2⁵ = 99145961 is a prime.

It is not a weakly prime, because it can be changed into another prime (99145493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49572996 + 49572997.

It is an arithmetic number, because the mean of its divisors is an integer number (49572997).

Almost surely, 2^99145993 is an apocalyptic number.

It is an amenable number.

99145993 is a deficient number, since it is larger than the sum of its proper divisors (1).

99145993 is an equidigital number, since it uses as much as digits as its factorization.

99145993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 393660, while the sum is 49.

The square root of 99145993 is about 9957.2080926332. The cubic root of 99145993 is about 462.8337875832.

The spelling of 99145993 in words is "ninety-nine million, one hundred forty-five thousand, nine hundred ninety-three".