878079913 has 2 divisors, whose sum is σ = 878079914. Its totient is φ = 878079912.

The previous prime is 878079887. The next prime is 878079919. The reversal of 878079913 is 319970878.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 601622784 + 276457129 = 24528^2 + 16627^2 .

It is a cyclic number.

It is not a de Polignac number, because 878079913 - 2¹³ = 878071721 is a prime.

It is a super-2 number, since 2×878079913² = 1542048667228175138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (878079919) 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, 439039956 + 439039957.

It is an arithmetic number, because the mean of its divisors is an integer number (439039957).

Almost surely, 2^878079913 is an apocalyptic number.

It is an amenable number.

878079913 is a deficient number, since it is larger than the sum of its proper divisors (1).

878079913 is an equidigital number, since it uses as much as digits as its factorization.

878079913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 52.

The square root of 878079913 is about 29632.4132159364. The cubic root of 878079913 is about 957.5864985131.

The spelling of 878079913 in words is "eight hundred seventy-eight million, seventy-nine thousand, nine hundred thirteen".