10878809 has 2 divisors, whose sum is σ = 10878810. Its totient is φ = 10878808.

The previous prime is 10878781. The next prime is 10878823. The reversal of 10878809 is 90887801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10758400 + 120409 = 3280^2 + 347^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10878809 is a prime.

It is not a weakly prime, because it can be changed into another prime (10878209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5439404 + 5439405.

It is an arithmetic number, because the mean of its divisors is an integer number (5439405).

Almost surely, 2^10878809 is an apocalyptic number.

It is an amenable number.

10878809 is a deficient number, since it is larger than the sum of its proper divisors (1).

10878809 is an equidigital number, since it uses as much as digits as its factorization.

10878809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 41.

The square root of 10878809 is about 3298.3039580973. The cubic root of 10878809 is about 221.5782445180.

The spelling of 10878809 in words is "ten million, eight hundred seventy-eight thousand, eight hundred nine".