873128761 has 4 divisors (see below), whose sum is σ = 877267024. Its totient is φ = 868990500.

The previous prime is 873128747. The next prime is 873128771. The reversal of 873128761 is 167821378.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 167821378 = 2 ⋅83910689.

It is a cyclic number.

It is not a de Polignac number, because 873128761 - 2²⁹ = 336257849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (873128771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2068815 + ... + 2069236.

It is an arithmetic number, because the mean of its divisors is an integer number (219316756).

Almost surely, 2^873128761 is an apocalyptic number.

It is an amenable number.

873128761 is a deficient number, since it is larger than the sum of its proper divisors (4138263).

873128761 is a wasteful number, since it uses less digits than its factorization.

873128761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4138262.

The product of its digits is 112896, while the sum is 43.

The square root of 873128761 is about 29548.7522748423. The cubic root of 873128761 is about 955.7832854503.

The spelling of 873128761 in words is "eight hundred seventy-three million, one hundred twenty-eight thousand, seven hundred sixty-one".