321263963 has 2 divisors, whose sum is σ = 321263964. Its totient is φ = 321263962.

The previous prime is 321263947. The next prime is 321264017. The reversal of 321263963 is 369362123.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321263963 - 2⁴ = 321263947 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (321260963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160631981 + 160631982.

It is an arithmetic number, because the mean of its divisors is an integer number (160631982).

Almost surely, 2^321263963 is an apocalyptic number.

321263963 is a deficient number, since it is larger than the sum of its proper divisors (1).

321263963 is an equidigital number, since it uses as much as digits as its factorization.

321263963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 35.

The square root of 321263963 is about 17923.8378423819. The cubic root of 321263963 is about 684.8897565316.

The spelling of 321263963 in words is "three hundred twenty-one million, two hundred sixty-three thousand, nine hundred sixty-three".