872181803 has 2 divisors, whose sum is σ = 872181804. Its totient is φ = 872181802.

The previous prime is 872181769. The next prime is 872181811. The reversal of 872181803 is 308181278.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 872181803 - 2⁸ = 872181547 is a prime.

It is not a weakly prime, because it can be changed into another prime (872181823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436090901 + 436090902.

It is an arithmetic number, because the mean of its divisors is an integer number (436090902).

Almost surely, 2^872181803 is an apocalyptic number.

872181803 is a deficient number, since it is larger than the sum of its proper divisors (1).

872181803 is an equidigital number, since it uses as much as digits as its factorization.

872181803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 38.

The square root of 872181803 is about 29532.7242732532. The cubic root of 872181803 is about 955.4376266074.

The spelling of 872181803 in words is "eight hundred seventy-two million, one hundred eighty-one thousand, eight hundred three".