103998815 has 4 divisors (see below), whose sum is σ = 124798584. Its totient is φ = 83199048.

The previous prime is 103998787. The next prime is 103998863. The reversal of 103998815 is 518899301.

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: 518899301 = 5843 ⋅88807.

It is a cyclic number.

It is not a de Polignac number, because 103998815 - 2¹⁰ = 103997791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10399877 + ... + 10399886.

It is an arithmetic number, because the mean of its divisors is an integer number (31199646).

Almost surely, 2^103998815 is an apocalyptic number.

103998815 is a deficient number, since it is larger than the sum of its proper divisors (20799769).

103998815 is an equidigital number, since it uses as much as digits as its factorization.

103998815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20799768.

The product of its (nonzero) digits is 77760, while the sum is 44.

The square root of 103998815 is about 10197.9809276150. The cubic root of 103998815 is about 470.2651514274.

The spelling of 103998815 in words is "one hundred three million, nine hundred ninety-eight thousand, eight hundred fifteen".