878294047 has 2 divisors, whose sum is σ = 878294048. Its totient is φ = 878294046.

The previous prime is 878294033. The next prime is 878294051. The reversal of 878294047 is 740492878.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-878294047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (878294947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439147023 + 439147024.

It is an arithmetic number, because the mean of its divisors is an integer number (439147024).

Almost surely, 2^878294047 is an apocalyptic number.

878294047 is a deficient number, since it is larger than the sum of its proper divisors (1).

878294047 is an equidigital number, since it uses as much as digits as its factorization.

878294047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 903168, while the sum is 49.

The square root of 878294047 is about 29636.0261674874. The cubic root of 878294047 is about 957.6643331757.

The spelling of 878294047 in words is "eight hundred seventy-eight million, two hundred ninety-four thousand, forty-seven".