872142877 has 4 divisors (see below), whose sum is σ = 872562460. Its totient is φ = 871723296.

The previous prime is 872142847. The next prime is 872142893. The reversal of 872142877 is 778241278.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 801229636 + 70913241 = 28306^2 + 8421^2 .

It is a cyclic number.

It is not a de Polignac number, because 872142877 - 2⁷ = 872142749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872142847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206658 + ... + 210835.

It is an arithmetic number, because the mean of its divisors is an integer number (218140615).

Almost surely, 2^872142877 is an apocalyptic number.

It is an amenable number.

872142877 is a deficient number, since it is larger than the sum of its proper divisors (419583).

872142877 is a wasteful number, since it uses less digits than its factorization.

872142877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419582.

The product of its digits is 351232, while the sum is 46.

The square root of 872142877 is about 29532.0652342500. The cubic root of 872142877 is about 955.4234124767.

The spelling of 872142877 in words is "eight hundred seventy-two million, one hundred forty-two thousand, eight hundred seventy-seven".