99478 has 4 divisors (see below), whose sum is σ = 149220. Its totient is φ = 49738.

The previous prime is 99469. The next prime is 99487. The reversal of 99478 is 87499.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87499 = 17 ⋅5147.

It is an interprime number because it is at equal distance from previous prime (99469) and next prime (99487).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24868 + ... + 24871.

It is an arithmetic number, because the mean of its divisors is an integer number (37305).

2⁹⁹⁴⁷⁸ is an apocalyptic number.

99478 is a deficient number, since it is larger than the sum of its proper divisors (49742).

99478 is a wasteful number, since it uses less digits than its factorization.

99478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49741.

The product of its digits is 18144, while the sum is 37.

The square root of 99478 is about 315.4013316395. The cubic root of 99478 is about 46.3349837527.

The spelling of 99478 in words is "ninety-nine thousand, four hundred seventy-eight".