99278843 has 4 divisors (see below), whose sum is σ = 99665400. Its totient is φ = 98892288.

The previous prime is 99278813. The next prime is 99278863. The reversal of 99278843 is 34887299.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99278843 - 2⁸ = 99278587 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99278791 and 99278800.

It is not an unprimeable number, because it can be changed into a prime (99278813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192893 + ... + 193406.

It is an arithmetic number, because the mean of its divisors is an integer number (24916350).

Almost surely, 2^99278843 is an apocalyptic number.

99278843 is a deficient number, since it is larger than the sum of its proper divisors (386557).

99278843 is a wasteful number, since it uses less digits than its factorization.

99278843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386556.

The product of its digits is 870912, while the sum is 50.

The square root of 99278843 is about 9963.8769061044. The cubic root of 99278843 is about 463.0404189827.

The spelling of 99278843 in words is "ninety-nine million, two hundred seventy-eight thousand, eight hundred forty-three".