445140023 has 2 divisors, whose sum is σ = 445140024. Its totient is φ = 445140022.

The previous prime is 445140013. The next prime is 445140029. The reversal of 445140023 is 320041544.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445140023 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445140029) 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, 222570011 + 222570012.

It is an arithmetic number, because the mean of its divisors is an integer number (222570012).

Almost surely, 2^445140023 is an apocalyptic number.

445140023 is a deficient number, since it is larger than the sum of its proper divisors (1).

445140023 is an equidigital number, since it uses as much as digits as its factorization.

445140023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 445140023 is about 21098.3417120872. The cubic root of 445140023 is about 763.5407401965.

Adding to 445140023 its reverse (320041544), we get a palindrome (765181567).

The spelling of 445140023 in words is "four hundred forty-five million, one hundred forty thousand, twenty-three".