445431023 has 4 divisors (see below), whose sum is σ = 455789928. Its totient is φ = 435072120.

The previous prime is 445431017. The next prime is 445431031. The reversal of 445431023 is 320134544.

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 445431023 - 2⁸ = 445430767 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 445430983 and 445431001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445431043) 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, 5179388 + ... + 5179473.

It is an arithmetic number, because the mean of its divisors is an integer number (113947482).

Almost surely, 2^445431023 is an apocalyptic number.

445431023 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

445431023 is a deficient number, since it is larger than the sum of its proper divisors (10358905).

445431023 is a wasteful number, since it uses less digits than its factorization.

445431023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10358904.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 445431023 is about 21105.2368619734. The cubic root of 445431023 is about 763.7070863230.

Adding to 445431023 its reverse (320134544), we get a palindrome (765565567).

The spelling of 445431023 in words is "four hundred forty-five million, four hundred thirty-one thousand, twenty-three".