10878209 has 2 divisors, whose sum is σ = 10878210. Its totient is φ = 10878208.

The previous prime is 10878193. The next prime is 10878223. The reversal of 10878209 is 90287801.

It is a happy number.

10878209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10705984 + 172225 = 3272^2 + 415^2 .

It is a cyclic number.

It is not a de Polignac number, because 10878209 - 2⁴ = 10878193 is a prime.

It is not a weakly prime, because it can be changed into another prime (10878239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5439104 + 5439105.

It is an arithmetic number, because the mean of its divisors is an integer number (5439105).

Almost surely, 2^10878209 is an apocalyptic number.

It is an amenable number.

10878209 is a deficient number, since it is larger than the sum of its proper divisors (1).

10878209 is an equidigital number, since it uses as much as digits as its factorization.

10878209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 10878209 is about 3298.2130010052. The cubic root of 10878209 is about 221.5741708677.

The spelling of 10878209 in words is "ten million, eight hundred seventy-eight thousand, two hundred nine".