878596949 has 2 divisors, whose sum is σ = 878596950. Its totient is φ = 878596948.

The previous prime is 878596933. The next prime is 878596981. The reversal of 878596949 is 949695878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 872788849 + 5808100 = 29543^2 + 2410^2 .

It is a cyclic number.

It is not a de Polignac number, because 878596949 - 2⁴ = 878596933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (878596909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439298474 + 439298475.

It is an arithmetic number, because the mean of its divisors is an integer number (439298475).

Almost surely, 2^878596949 is an apocalyptic number.

It is an amenable number.

878596949 is a deficient number, since it is larger than the sum of its proper divisors (1).

878596949 is an equidigital number, since it uses as much as digits as its factorization.

878596949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39191040, while the sum is 65.

The square root of 878596949 is about 29641.1360949610. The cubic root of 878596949 is about 957.7744121415.

The spelling of 878596949 in words is "eight hundred seventy-eight million, five hundred ninety-six thousand, nine hundred forty-nine".