878538247 has 2 divisors, whose sum is σ = 878538248. Its totient is φ = 878538246.

The previous prime is 878538187. The next prime is 878538251. The reversal of 878538247 is 742835878.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 878538247 - 2¹⁵ = 878505479 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 878538194 and 878538203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (878538277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439269123 + 439269124.

It is an arithmetic number, because the mean of its divisors is an integer number (439269124).

Almost surely, 2^878538247 is an apocalyptic number.

878538247 is a deficient number, since it is larger than the sum of its proper divisors (1).

878538247 is an equidigital number, since it uses as much as digits as its factorization.

878538247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3010560, while the sum is 52.

The square root of 878538247 is about 29640.1458667126. The cubic root of 878538247 is about 957.7530809628.

It can be divided in two parts, 87853 and 8247, that added together give a square (96100 = 310²).

The spelling of 878538247 in words is "eight hundred seventy-eight million, five hundred thirty-eight thousand, two hundred forty-seven".