103878921 has 8 divisors (see below), whose sum is σ = 138634560. Its totient is φ = 69187952.

The previous prime is 103878911. The next prime is 103878937. The reversal of 103878921 is 129878301.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 103878921 - 2⁵ = 103878889 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 103878921.

It is not an unprimeable number, because it can be changed into a prime (103878911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12285 + ... + 18938.

It is an arithmetic number, because the mean of its divisors is an integer number (17329320).

Almost surely, 2^103878921 is an apocalyptic number.

It is an amenable number.

103878921 is a deficient number, since it is larger than the sum of its proper divisors (34755639).

103878921 is a wasteful number, since it uses less digits than its factorization.

103878921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32335.

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 103878921 is about 10192.1009119808. The cubic root of 103878921 is about 470.0843684367.

The spelling of 103878921 in words is "one hundred three million, eight hundred seventy-eight thousand, nine hundred twenty-one".