845440507 has 4 divisors (see below), whose sum is σ = 845515120. Its totient is φ = 845365896.

The previous prime is 845440489. The next prime is 845440517. The reversal of 845440507 is 705044548.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-845440507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (845440517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16407 + ... + 44272.

It is an arithmetic number, because the mean of its divisors is an integer number (211378780).

Almost surely, 2^845440507 is an apocalyptic number.

845440507 is a deficient number, since it is larger than the sum of its proper divisors (74613).

845440507 is a wasteful number, since it uses less digits than its factorization.

845440507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74612.

The product of its (nonzero) digits is 89600, while the sum is 37.

The square root of 845440507 is about 29076.4596710122. The cubic root of 845440507 is about 945.5714494859.

The spelling of 845440507 in words is "eight hundred forty-five million, four hundred forty thousand, five hundred seven".