872136887 has 2 divisors, whose sum is σ = 872136888. Its totient is φ = 872136886.

The previous prime is 872136883. The next prime is 872136901. The reversal of 872136887 is 788631278.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 872136887 - 2² = 872136883 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (872136883) 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 as a sum of consecutive naturals, namely, 436068443 + 436068444.

It is an arithmetic number, because the mean of its divisors is an integer number (436068444).

Almost surely, 2^872136887 is an apocalyptic number.

872136887 is a deficient number, since it is larger than the sum of its proper divisors (1).

872136887 is an equidigital number, since it uses as much as digits as its factorization.

872136887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 903168, while the sum is 50.

The square root of 872136887 is about 29531.9638188861. The cubic root of 872136887 is about 955.4212251442.

The spelling of 872136887 in words is "eight hundred seventy-two million, one hundred thirty-six thousand, eight hundred eighty-seven".