1355449747 has 2 divisors, whose sum is σ = 1355449748. Its totient is φ = 1355449746.

The previous prime is 1355449723. The next prime is 1355449783. The reversal of 1355449747 is 7479445531.

It is a weak prime.

It is an emirp because it is prime and its reverse (7479445531) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1355449747 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1355449747.

It is not a weakly prime, because it can be changed into another prime (1355444747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 677724873 + 677724874.

It is an arithmetic number, because the mean of its divisors is an integer number (677724874).

Almost surely, 2^1355449747 is an apocalyptic number.

1355449747 is a deficient number, since it is larger than the sum of its proper divisors (1).

1355449747 is an equidigital number, since it uses as much as digits as its factorization.

1355449747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2116800, while the sum is 49.

The square root of 1355449747 is about 36816.4331107727. The cubic root of 1355449747 is about 1106.6946410023.

The spelling of 1355449747 in words is "one billion, three hundred fifty-five million, four hundred forty-nine thousand, seven hundred forty-seven".