445479421 has 2 divisors, whose sum is σ = 445479422. Its totient is φ = 445479420.

The previous prime is 445479389. The next prime is 445479427. The reversal of 445479421 is 124974544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 378730521 + 66748900 = 19461^2 + 8170^2 .

It is a cyclic number.

It is not a de Polignac number, because 445479421 - 2⁵ = 445479389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445479427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222739710 + 222739711.

It is an arithmetic number, because the mean of its divisors is an integer number (222739711).

Almost surely, 2^445479421 is an apocalyptic number.

It is an amenable number.

445479421 is a deficient number, since it is larger than the sum of its proper divisors (1).

445479421 is an equidigital number, since it uses as much as digits as its factorization.

445479421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 40.

The square root of 445479421 is about 21106.3834182931. The cubic root of 445479421 is about 763.7347453432.

The spelling of 445479421 in words is "four hundred forty-five million, four hundred seventy-nine thousand, four hundred twenty-one".