878049157 has 2 divisors, whose sum is σ = 878049158. Its totient is φ = 878049156.

The previous prime is 878049143. The next prime is 878049187. The reversal of 878049157 is 751940878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 877699876 + 349281 = 29626^2 + 591^2 .

It is a cyclic number.

It is not a de Polignac number, because 878049157 - 2¹⁵ = 878016389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 878049157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (878049187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439024578 + 439024579.

It is an arithmetic number, because the mean of its divisors is an integer number (439024579).

Almost surely, 2^878049157 is an apocalyptic number.

It is an amenable number.

878049157 is a deficient number, since it is larger than the sum of its proper divisors (1).

878049157 is an equidigital number, since it uses as much as digits as its factorization.

878049157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 564480, while the sum is 49.

The square root of 878049157 is about 29631.8942526461. The cubic root of 878049157 is about 957.5753181054.

The spelling of 878049157 in words is "eight hundred seventy-eight million, forty-nine thousand, one hundred fifty-seven".