445128623 has 2 divisors, whose sum is σ = 445128624. Its totient is φ = 445128622.

The previous prime is 445128601. The next prime is 445128653. The reversal of 445128623 is 326821544.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445128623 is a prime.

It is a super-2 number, since 2×445128623² = 396278982027752258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445128653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222564311 + 222564312.

It is an arithmetic number, because the mean of its divisors is an integer number (222564312).

Almost surely, 2^445128623 is an apocalyptic number.

445128623 is a deficient number, since it is larger than the sum of its proper divisors (1).

445128623 is an equidigital number, since it uses as much as digits as its factorization.

445128623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46080, while the sum is 35.

The square root of 445128623 is about 21098.0715469448. The cubic root of 445128623 is about 763.5342220687.

It can be divided in two parts, 44512 and 8623, that added together give a palindrome (53135).

The spelling of 445128623 in words is "four hundred forty-five million, one hundred twenty-eight thousand, six hundred twenty-three".