445737521 has 2 divisors, whose sum is σ = 445737522. Its totient is φ = 445737520.

The previous prime is 445737469. The next prime is 445737541. The reversal of 445737521 is 125737544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 280897600 + 164839921 = 16760^2 + 12839^2 .

It is a cyclic number.

It is not a de Polignac number, because 445737521 - 2¹⁸ = 445475377 is a prime.

It is not a weakly prime, because it can be changed into another prime (445737541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222868760 + 222868761.

It is an arithmetic number, because the mean of its divisors is an integer number (222868761).

Almost surely, 2^445737521 is an apocalyptic number.

It is an amenable number.

445737521 is a deficient number, since it is larger than the sum of its proper divisors (1).

445737521 is an equidigital number, since it uses as much as digits as its factorization.

445737521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 117600, while the sum is 38.

The square root of 445737521 is about 21112.4967969210. The cubic root of 445737521 is about 763.8822133457.

The spelling of 445737521 in words is "four hundred forty-five million, seven hundred thirty-seven thousand, five hundred twenty-one".