1082747821 has 2 divisors, whose sum is σ = 1082747822. Its totient is φ = 1082747820.

The previous prime is 1082747801. The next prime is 1082747863. The reversal of 1082747821 is 1287472801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 801682596 + 281065225 = 28314^2 + 16765^2 .

It is an emirp because it is prime and its reverse (1287472801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1082747821 - 2¹⁷ = 1082616749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1082747801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 541373910 + 541373911.

It is an arithmetic number, because the mean of its divisors is an integer number (541373911).

Almost surely, 2^1082747821 is an apocalyptic number.

It is an amenable number.

1082747821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1082747821 is an equidigital number, since it uses as much as digits as its factorization.

1082747821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50176, while the sum is 40.

The square root of 1082747821 is about 32905.1336572274. The cubic root of 1082747821 is about 1026.8549621723.

The spelling of 1082747821 in words is "one billion, eighty-two million, seven hundred forty-seven thousand, eight hundred twenty-one".