99278523 has 48 divisors (see below), whose sum is σ = 154791936. Its totient is φ = 61205760.

The previous prime is 99278497. The next prime is 99278527. The reversal of 99278523 is 32587299.

It is not a de Polignac number, because 99278523 - 2¹³ = 99270331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99278527) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 878515 + ... + 878627.

It is an arithmetic number, because the mean of its divisors is an integer number (3224832).

Almost surely, 2^99278523 is an apocalyptic number.

99278523 is a gapful number since it is divisible by the number (93) formed by its first and last digit.

99278523 is a deficient number, since it is larger than the sum of its proper divisors (55513413).

99278523 is a wasteful number, since it uses less digits than its factorization.

99278523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264 (or 261 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 99278523 is about 9963.8608480849. The cubic root of 99278523 is about 463.0399214847.

The spelling of 99278523 in words is "ninety-nine million, two hundred seventy-eight thousand, five hundred twenty-three".