104878399 has 2 divisors, whose sum is σ = 104878400. Its totient is φ = 104878398.

The previous prime is 104878391. The next prime is 104878441. The reversal of 104878399 is 993878401.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 104878399 - 2³ = 104878391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104878391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52439199 + 52439200.

It is an arithmetic number, because the mean of its divisors is an integer number (52439200).

Almost surely, 2^104878399 is an apocalyptic number.

104878399 is a deficient number, since it is larger than the sum of its proper divisors (1).

104878399 is an equidigital number, since it uses as much as digits as its factorization.

104878399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 104878399 is about 10241.0155258158. The cubic root of 104878399 is about 471.5872082198.

The spelling of 104878399 in words is "one hundred four million, eight hundred seventy-eight thousand, three hundred ninety-nine".