1248391747 has 2 divisors, whose sum is σ = 1248391748. Its totient is φ = 1248391746.

The previous prime is 1248391741. The next prime is 1248391777. The reversal of 1248391747 is 7471938421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1248391747 - 2⁷ = 1248391619 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1248391697 and 1248391706.

It is not a weakly prime, because it can be changed into another prime (1248391741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624195873 + 624195874.

It is an arithmetic number, because the mean of its divisors is an integer number (624195874).

Almost surely, 2^1248391747 is an apocalyptic number.

1248391747 is a deficient number, since it is larger than the sum of its proper divisors (1).

1248391747 is an equidigital number, since it uses as much as digits as its factorization.

1248391747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 46.

The square root of 1248391747 is about 35332.5876069104. The cubic root of 1248391747 is about 1076.7551632707.

The spelling of 1248391747 in words is "one billion, two hundred forty-eight million, three hundred ninety-one thousand, seven hundred forty-seven".