1278449483 has 2 divisors, whose sum is σ = 1278449484. Its totient is φ = 1278449482.

The previous prime is 1278449467. The next prime is 1278449507. The reversal of 1278449483 is 3849448721.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1278449483 - 2⁴ = 1278449467 is a prime.

It is not a weakly prime, because it can be changed into another prime (1278440483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639224741 + 639224742.

It is an arithmetic number, because the mean of its divisors is an integer number (639224742).

Almost surely, 2^1278449483 is an apocalyptic number.

1278449483 is a deficient number, since it is larger than the sum of its proper divisors (1).

1278449483 is an equidigital number, since it uses as much as digits as its factorization.

1278449483 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1548288, while the sum is 50.

The square root of 1278449483 is about 35755.4119400127. The cubic root of 1278449483 is about 1085.3284579697.

The spelling of 1278449483 in words is "one billion, two hundred seventy-eight million, four hundred forty-nine thousand, four hundred eighty-three".