878251873 has 2 divisors, whose sum is σ = 878251874. Its totient is φ = 878251872.

The previous prime is 878251867. The next prime is 878251883. The reversal of 878251873 is 378152878.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 453562209 + 424689664 = 21297^2 + 20608^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-878251873 is a prime.

It is not a weakly prime, because it can be changed into another prime (878251813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439125936 + 439125937.

It is an arithmetic number, because the mean of its divisors is an integer number (439125937).

Almost surely, 2^878251873 is an apocalyptic number.

It is an amenable number.

878251873 is a deficient number, since it is larger than the sum of its proper divisors (1).

878251873 is an equidigital number, since it uses as much as digits as its factorization.

878251873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 752640, while the sum is 49.

The square root of 878251873 is about 29635.3146263035. The cubic root of 878251873 is about 957.6490045272.

It can be divided in two parts, 87825 and 1873, that added together give a palindrome (89698).

The spelling of 878251873 in words is "eight hundred seventy-eight million, two hundred fifty-one thousand, eight hundred seventy-three".