421063961 has 2 divisors, whose sum is σ = 421063962. Its totient is φ = 421063960.

The previous prime is 421063957. The next prime is 421063987. The reversal of 421063961 is 169360124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 226321936 + 194742025 = 15044^2 + 13955^2 .

It is a cyclic number.

It is not a de Polignac number, because 421063961 - 2² = 421063957 is a prime.

It is not a weakly prime, because it can be changed into another prime (421063931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210531980 + 210531981.

It is an arithmetic number, because the mean of its divisors is an integer number (210531981).

Almost surely, 2^421063961 is an apocalyptic number.

It is an amenable number.

421063961 is a deficient number, since it is larger than the sum of its proper divisors (1).

421063961 is an equidigital number, since it uses as much as digits as its factorization.

421063961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 421063961 is about 20519.8431036887. The cubic root of 421063961 is about 749.5190759783.

The spelling of 421063961 in words is "four hundred twenty-one million, sixty-three thousand, nine hundred sixty-one".