877949 has 2 divisors, whose sum is σ = 877950. Its totient is φ = 877948.

The previous prime is 877939. The next prime is 877997. The reversal of 877949 is 949778.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 792100 + 85849 = 890^2 + 293^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-877949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (877909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 438974 + 438975.

It is an arithmetic number, because the mean of its divisors is an integer number (438975).

2⁸⁷⁷⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

877949 is a deficient number, since it is larger than the sum of its proper divisors (1).

877949 is an equidigital number, since it uses as much as digits as its factorization.

877949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 44.

The square root of 877949 is about 936.9893275806. The cubic root of 877949 is about 95.7538907267.

The spelling of 877949 in words is "eight hundred seventy-seven thousand, nine hundred forty-nine".