99993493 has 4 divisors (see below), whose sum is σ = 100511788. Its totient is φ = 99475200.

The previous prime is 99993469. The next prime is 99993497. The reversal of 99993493 is 39439999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39439999 = 139 ⋅283741.

It can be written as a sum of positive squares in 2 ways, for example, as 22676644 + 77316849 = 4762^2 + 8793^2 .

It is a cyclic number.

It is not a de Polignac number, because 99993493 - 2⁵ = 99993461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99993497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258858 + ... + 259243.

It is an arithmetic number, because the mean of its divisors is an integer number (25127947).

Almost surely, 2^99993493 is an apocalyptic number.

It is an amenable number.

99993493 is a deficient number, since it is larger than the sum of its proper divisors (518295).

99993493 is a wasteful number, since it uses less digits than its factorization.

99993493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518294.

The product of its digits is 2125764, while the sum is 55.

The square root of 99993493 is about 9999.6746447072. The cubic root of 99993493 is about 464.1488155367.

The spelling of 99993493 in words is "ninety-nine million, nine hundred ninety-three thousand, four hundred ninety-three".