1320471751 has 2 divisors, whose sum is σ = 1320471752. Its totient is φ = 1320471750.

The previous prime is 1320471749. The next prime is 1320471769. The reversal of 1320471751 is 1571740231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1320471751 - 2¹ = 1320471749 is a prime.

Together with 1320471749, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320471701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660235875 + 660235876.

It is an arithmetic number, because the mean of its divisors is an integer number (660235876).

Almost surely, 2^1320471751 is an apocalyptic number.

1320471751 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320471751 is an equidigital number, since it uses as much as digits as its factorization.

1320471751 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 1320471751 is about 36338.2959286756. The cubic root of 1320471751 is about 1097.0919748701.

The spelling of 1320471751 in words is "one billion, three hundred twenty million, four hundred seventy-one thousand, seven hundred fifty-one".