878369431 has 2 divisors, whose sum is σ = 878369432. Its totient is φ = 878369430.

The previous prime is 878369423. The next prime is 878369461. The reversal of 878369431 is 134963878.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 878369431 - 2³ = 878369423 is a prime.

It is a super-2 number, since 2×878369431² = 1543065714630527522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (878369461) 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, 439184715 + 439184716.

It is an arithmetic number, because the mean of its divisors is an integer number (439184716).

Almost surely, 2^878369431 is an apocalyptic number.

878369431 is a deficient number, since it is larger than the sum of its proper divisors (1).

878369431 is an equidigital number, since it uses as much as digits as its factorization.

878369431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 49.

The square root of 878369431 is about 29637.2979706315. The cubic root of 878369431 is about 957.6917311764.

The spelling of 878369431 in words is "eight hundred seventy-eight million, three hundred sixty-nine thousand, four hundred thirty-one".