840878267 has 2 divisors, whose sum is σ = 840878268. Its totient is φ = 840878266.

The previous prime is 840878261. The next prime is 840878309. The reversal of 840878267 is 762878048.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 840878267 - 2²⁴ = 824101051 is a prime.

It is not a weakly prime, because it can be changed into another prime (840878261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420439133 + 420439134.

It is an arithmetic number, because the mean of its divisors is an integer number (420439134).

Almost surely, 2^840878267 is an apocalyptic number.

840878267 is a deficient number, since it is larger than the sum of its proper divisors (1).

840878267 is an equidigital number, since it uses as much as digits as its factorization.

840878267 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1204224, while the sum is 50.

The square root of 840878267 is about 28997.9010792161. The cubic root of 840878267 is about 943.8675223908.

The spelling of 840878267 in words is "eight hundred forty million, eight hundred seventy-eight thousand, two hundred sixty-seven".