447330421 has 2 divisors, whose sum is σ = 447330422. Its totient is φ = 447330420.

The previous prime is 447330371. The next prime is 447330437. The reversal of 447330421 is 124033744.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 447322500 + 7921 = 21150^2 + 89^2 .

It is a cyclic number.

It is not a de Polignac number, because 447330421 - 2⁷ = 447330293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 447330421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (447330451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223665210 + 223665211.

It is an arithmetic number, because the mean of its divisors is an integer number (223665211).

Almost surely, 2^447330421 is an apocalyptic number.

It is an amenable number.

447330421 is a deficient number, since it is larger than the sum of its proper divisors (1).

447330421 is an equidigital number, since it uses as much as digits as its factorization.

447330421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 447330421 is about 21150.1872568543. The cubic root of 447330421 is about 764.7910751325.

The spelling of 447330421 in words is "four hundred forty-seven million, three hundred thirty thousand, four hundred twenty-one".