421307963 has 2 divisors, whose sum is σ = 421307964. Its totient is φ = 421307962.

The previous prime is 421307947. The next prime is 421307977. The reversal of 421307963 is 369703124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421307963 - 2⁴ = 421307947 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (421307363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210653981 + 210653982.

It is an arithmetic number, because the mean of its divisors is an integer number (210653982).

Almost surely, 2^421307963 is an apocalyptic number.

421307963 is a deficient number, since it is larger than the sum of its proper divisors (1).

421307963 is an equidigital number, since it uses as much as digits as its factorization.

421307963 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 421307963 is about 20525.7877558938. The cubic root of 421307963 is about 749.6638274139.

The spelling of 421307963 in words is "four hundred twenty-one million, three hundred seven thousand, nine hundred sixty-three".