873976781 has 8 divisors (see below), whose sum is σ = 880350744. Its totient is φ = 867620160.

The previous prime is 873976771. The next prime is 873976813. The reversal of 873976781 is 187679378.

It can be written as a sum of positive squares in 4 ways, for example, as 203632900 + 670343881 = 14270^2 + 25891^2 .

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 873976781 - 2¹⁰ = 873975757 is a prime.

It is a super-2 number, since 2×873976781² = 1527670827454243922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (873976711) 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 in 7 ways as a sum of consecutive naturals, for example, 107015 + ... + 114891.

It is an arithmetic number, because the mean of its divisors is an integer number (110043843).

Almost surely, 2^873976781 is an apocalyptic number.

It is an amenable number.

873976781 is a deficient number, since it is larger than the sum of its proper divisors (6373963).

873976781 is a wasteful number, since it uses less digits than its factorization.

873976781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8671.

The product of its digits is 3556224, while the sum is 56.

The square root of 873976781 is about 29563.0982983854. The cubic root of 873976781 is about 956.0926178628.

The spelling of 873976781 in words is "eight hundred seventy-three million, nine hundred seventy-six thousand, seven hundred eighty-one".