447676421 has 2 divisors, whose sum is σ = 447676422. Its totient is φ = 447676420.

The previous prime is 447676409. The next prime is 447676441. The reversal of 447676421 is 124676744.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 362483521 + 85192900 = 19039^2 + 9230^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-447676421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (447676441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223838210 + 223838211.

It is an arithmetic number, because the mean of its divisors is an integer number (223838211).

Almost surely, 2^447676421 is an apocalyptic number.

It is an amenable number.

447676421 is a deficient number, since it is larger than the sum of its proper divisors (1).

447676421 is an equidigital number, since it uses as much as digits as its factorization.

447676421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 41.

The square root of 447676421 is about 21158.3652723929. The cubic root of 447676421 is about 764.9882072028.

The spelling of 447676421 in words is "four hundred forty-seven million, six hundred seventy-six thousand, four hundred twenty-one".