445457923 has 2 divisors, whose sum is σ = 445457924. Its totient is φ = 445457922.

The previous prime is 445457897. The next prime is 445457927. The reversal of 445457923 is 329754544.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 445457923 - 2⁵ = 445457891 is a prime.

It is a super-2 number, since 2×445457923² = 396865522326947858, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 445457923.

It is not a weakly prime, because it can be changed into another prime (445457927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222728961 + 222728962.

It is an arithmetic number, because the mean of its divisors is an integer number (222728962).

Almost surely, 2^445457923 is an apocalyptic number.

445457923 is a deficient number, since it is larger than the sum of its proper divisors (1).

445457923 is an equidigital number, since it uses as much as digits as its factorization.

445457923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 604800, while the sum is 43.

The square root of 445457923 is about 21105.8741349417. The cubic root of 445457923 is about 763.7224596775.

The spelling of 445457923 in words is "four hundred forty-five million, four hundred fifty-seven thousand, nine hundred twenty-three".