103978809 has 45 divisors (see below), whose sum is σ = 172404309. Its totient is φ = 62405640.

The previous prime is 103978801. The next prime is 103978873. The reversal of 103978809 is 908879301.

The square root of 103978809 is 10197.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 103978809 - 2³ = 103978801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (103978801) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 1009452 + ... + 1009554.

Almost surely, 2^103978809 is an apocalyptic number.

103978809 is the 10197-th square number.

103978809 is the 5099-th centered octagonal number.

It is an amenable number.

103978809 is a deficient number, since it is larger than the sum of its proper divisors (68425500).

103978809 is an equidigital number, since it uses as much as digits as its factorization.

103978809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The cubic root of 103978809 is about 470.2349949044.

The spelling of 103978809 in words is "one hundred three million, nine hundred seventy-eight thousand, eight hundred nine".