99278422 has 4 divisors (see below), whose sum is σ = 148917636. Its totient is φ = 49639210.

The previous prime is 99278407. The next prime is 99278447. The reversal of 99278422 is 22487299.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 24819604 + ... + 24819607.

It is an arithmetic number, because the mean of its divisors is an integer number (37229409).

Almost surely, 2^99278422 is an apocalyptic number.

99278422 is a deficient number, since it is larger than the sum of its proper divisors (49639214).

99278422 is a wasteful number, since it uses less digits than its factorization.

99278422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49639213.

The product of its digits is 145152, while the sum is 43.

The square root of 99278422 is about 9963.8557797672. The cubic root of 99278422 is about 463.0397644616.

The spelling of 99278422 in words is "ninety-nine million, two hundred seventy-eight thousand, four hundred twenty-two".