445572409 has 2 divisors, whose sum is σ = 445572410. Its totient is φ = 445572408.

The previous prime is 445572383. The next prime is 445572451. The reversal of 445572409 is 904275544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 424154025 + 21418384 = 20595^2 + 4628^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445572409 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (445572109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222786204 + 222786205.

It is an arithmetic number, because the mean of its divisors is an integer number (222786205).

Almost surely, 2^445572409 is an apocalyptic number.

It is an amenable number.

445572409 is a deficient number, since it is larger than the sum of its proper divisors (1).

445572409 is an equidigital number, since it uses as much as digits as its factorization.

445572409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 201600, while the sum is 40.

The square root of 445572409 is about 21108.5861440315. The cubic root of 445572409 is about 763.7878815244.

The spelling of 445572409 in words is "four hundred forty-five million, five hundred seventy-two thousand, four hundred nine".