878631469 has 2 divisors, whose sum is σ = 878631470. Its totient is φ = 878631468.

The previous prime is 878631437. The next prime is 878631493. The reversal of 878631469 is 964136878.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 659976100 + 218655369 = 25690^2 + 14787^2 .

It is a cyclic number.

It is not a de Polignac number, because 878631469 - 2⁵ = 878631437 is a prime.

It is a super-2 number, since 2×878631469² = 1543986516634195922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (878631499) 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, 439315734 + 439315735.

It is an arithmetic number, because the mean of its divisors is an integer number (439315735).

Almost surely, 2^878631469 is an apocalyptic number.

It is an amenable number.

878631469 is a deficient number, since it is larger than the sum of its proper divisors (1).

878631469 is an equidigital number, since it uses as much as digits as its factorization.

878631469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1741824, while the sum is 52.

The square root of 878631469 is about 29641.7183881097. The cubic root of 878631469 is about 957.7869556025.

The spelling of 878631469 in words is "eight hundred seventy-eight million, six hundred thirty-one thousand, four hundred sixty-nine".