1348770821 has 2 divisors, whose sum is σ = 1348770822. Its totient is φ = 1348770820.

The previous prime is 1348770781. The next prime is 1348770823. The reversal of 1348770821 is 1280778431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1187836225 + 160934596 = 34465^2 + 12686^2 .

It is a cyclic number.

It is not a de Polignac number, because 1348770821 - 2¹⁰ = 1348769797 is a prime.

It is a Sophie Germain prime.

Together with 1348770823, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1348770823) 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 as a sum of consecutive naturals, namely, 674385410 + 674385411.

It is an arithmetic number, because the mean of its divisors is an integer number (674385411).

Almost surely, 2^1348770821 is an apocalyptic number.

It is an amenable number.

1348770821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1348770821 is an equidigital number, since it uses as much as digits as its factorization.

1348770821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 1348770821 is about 36725.6153250017. The cubic root of 1348770821 is about 1104.8739155771.

The spelling of 1348770821 in words is "one billion, three hundred forty-eight million, seven hundred seventy thousand, eight hundred twenty-one".