877993 has 4 divisors (see below), whose sum is σ = 886788. Its totient is φ = 869200.

The previous prime is 877949. The next prime is 877997. The reversal of 877993 is 399778.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 399778 = 2 ⋅199889.

It can be written as a sum of positive squares in 2 ways, for example, as 451584 + 426409 = 672^2 + 653^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-877993 is a prime.

It is a Duffinian number.

877993 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (877997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4246 + ... + 4447.

It is an arithmetic number, because the mean of its divisors is an integer number (221697).

2⁸⁷⁷⁹⁹³ is an apocalyptic number.

It is an amenable number.

877993 is a deficient number, since it is larger than the sum of its proper divisors (8795).

877993 is a wasteful number, since it uses less digits than its factorization.

877993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8794.

The product of its digits is 95256, while the sum is 43.

The square root of 877993 is about 937.0128067428. The cubic root of 877993 is about 95.7554903264.

The spelling of 877993 in words is "eight hundred seventy-seven thousand, nine hundred ninety-three".