445404523 has 4 divisors (see below), whose sum is σ = 446750488. Its totient is φ = 444058560.

The previous prime is 445404481. The next prime is 445404541. The reversal of 445404523 is 325404544.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 445404523 - 2¹³ = 445396331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445404623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 672486 + ... + 673147.

It is an arithmetic number, because the mean of its divisors is an integer number (111687622).

Almost surely, 2^445404523 is an apocalyptic number.

445404523 is a deficient number, since it is larger than the sum of its proper divisors (1345965).

445404523 is a wasteful number, since it uses less digits than its factorization.

445404523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345964.

The product of its (nonzero) digits is 38400, while the sum is 31.

The square root of 445404523 is about 21104.6090463671. The cubic root of 445404523 is about 763.6919409633.

The spelling of 445404523 in words is "four hundred forty-five million, four hundred four thousand, five hundred twenty-three".