99993455 has 4 divisors (see below), whose sum is σ = 119992152. Its totient is φ = 79994760.

The previous prime is 99993449. The next prime is 99993461. The reversal of 99993455 is 55439999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55439999 = 59 ⋅939661.

It is an interprime number because it is at equal distance from previous prime (99993449) and next prime (99993461).

It is not a de Polignac number, because 99993455 - 2⁸ = 99993199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99993397 and 99993406.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9999341 + ... + 9999350.

It is an arithmetic number, because the mean of its divisors is an integer number (29998038).

Almost surely, 2^99993455 is an apocalyptic number.

99993455 is a deficient number, since it is larger than the sum of its proper divisors (19998697).

99993455 is a wasteful number, since it uses less digits than its factorization.

99993455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19998696.

The product of its digits is 1968300, while the sum is 53.

The square root of 99993455 is about 9999.6727446452. The cubic root of 99993455 is about 464.1487567407.

The spelling of 99993455 in words is "ninety-nine million, nine hundred ninety-three thousand, four hundred fifty-five".