2868766921 has 8 divisors (see below), whose sum is σ = 2924145224. Its totient is φ = 2813823360.

The previous prime is 2868766919. The next prime is 2868766963. The reversal of 2868766921 is 1296678682.

It can be written as a sum of positive squares in 4 ways, for example, as 37994896 + 2830772025 = 6164^2 + 53205^2 .

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 2868766921 - 2¹ = 2868766919 is a prime.

It is a super-4 number, since 4×2868766921⁴ (a number of 39 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2868766981) 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 7 ways as a sum of consecutive naturals, for example, 95346 + ... + 121771.

It is an arithmetic number, because the mean of its divisors is an integer number (365518153).

Almost surely, 2^2868766921 is an apocalyptic number.

It is an amenable number.

2868766921 is a deficient number, since it is larger than the sum of its proper divisors (55378303).

2868766921 is a wasteful number, since it uses less digits than its factorization.

2868766921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217371.

The product of its digits is 3483648, while the sum is 55.

The square root of 2868766921 is about 53560.8711747671. The cubic root of 2868766921 is about 1420.9051494511.

The spelling of 2868766921 in words is "two billion, eight hundred sixty-eight million, seven hundred sixty-six thousand, nine hundred twenty-one".