1320946961 has 2 divisors, whose sum is σ = 1320946962. Its totient is φ = 1320946960.

The previous prime is 1320946951. The next prime is 1320946969. The reversal of 1320946961 is 1696490231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 881793025 + 439153936 = 29695^2 + 20956^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1320946961 is a prime.

It is not a weakly prime, because it can be changed into another prime (1320946969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660473480 + 660473481.

It is an arithmetic number, because the mean of its divisors is an integer number (660473481).

Almost surely, 2^1320946961 is an apocalyptic number.

It is an amenable number.

1320946961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320946961 is an equidigital number, since it uses as much as digits as its factorization.

1320946961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 1320946961 is about 36344.8340345640. The cubic root of 1320946961 is about 1097.2235658586.

The spelling of 1320946961 in words is "one billion, three hundred twenty million, nine hundred forty-six thousand, nine hundred sixty-one".