872735781 has 8 divisors (see below), whose sum is σ = 1168073280. Its totient is φ = 579611072.

The previous prime is 872735767. The next prime is 872735813. The reversal of 872735781 is 187537278.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 872735781 - 2¹⁰ = 872734757 is a prime.

It is a super-2 number, since 2×872735781² = 1523335486875359922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 872735781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872735081) 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 7 ways as a sum of consecutive naturals, for example, 552276 + ... + 553853.

It is an arithmetic number, because the mean of its divisors is an integer number (146009160).

Almost surely, 2^872735781 is an apocalyptic number.

It is an amenable number.

872735781 is a deficient number, since it is larger than the sum of its proper divisors (295337499).

872735781 is a wasteful number, since it uses less digits than its factorization.

872735781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106395.

The product of its digits is 658560, while the sum is 48.

The square root of 872735781 is about 29542.1018378855. The cubic root of 872735781 is about 955.6398701462.

The spelling of 872735781 in words is "eight hundred seventy-two million, seven hundred thirty-five thousand, seven hundred eighty-one".