1320959263 has 6 divisors (see below), whose sum is σ = 1430388024. Its totient is φ = 1219346856.

The previous prime is 1320959261. The next prime is 1320959281. The reversal of 1320959263 is 3629590231.

It is not a de Polignac number, because 1320959263 - 2¹ = 1320959261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320959261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3907995 + ... + 3908332.

It is an arithmetic number, because the mean of its divisors is an integer number (238398004).

Almost surely, 2^1320959263 is an apocalyptic number.

1320959263 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1320959263 is a deficient number, since it is larger than the sum of its proper divisors (109428761).

1320959263 is an equidigital number, since it uses as much as digits as its factorization.

1320959263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7816353 (or 7816340 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 40.

The square root of 1320959263 is about 36345.0032741779. The cubic root of 1320959263 is about 1097.2269720015.

The spelling of 1320959263 in words is "one billion, three hundred twenty million, nine hundred fifty-nine thousand, two hundred sixty-three".