2787934321 has 2 divisors, whose sum is σ = 2787934322. Its totient is φ = 2787934320.

The previous prime is 2787934319. The next prime is 2787934367. The reversal of 2787934321 is 1234397872.

It is an a-pointer prime, because the next prime (2787934367) can be obtained adding 2787934321 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1673709921 + 1114224400 = 40911^2 + 33380^2 .

It is a cyclic number.

It is not a de Polignac number, because 2787934321 - 2¹ = 2787934319 is a prime.

Together with 2787934319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2787934621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1393967160 + 1393967161.

It is an arithmetic number, because the mean of its divisors is an integer number (1393967161).

Almost surely, 2^2787934321 is an apocalyptic number.

It is an amenable number.

2787934321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2787934321 is an equidigital number, since it uses as much as digits as its factorization.

2787934321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 46.

The square root of 2787934321 is about 52800.8931837332. The cubic root of 2787934321 is about 1407.4322970210.

The spelling of 2787934321 in words is "two billion, seven hundred eighty-seven million, nine hundred thirty-four thousand, three hundred twenty-one".