845395439 has 16 divisors (see below), whose sum is σ = 994541568. Its totient is φ = 703588032.

The previous prime is 845395427. The next prime is 845395457. The reversal of 845395439 is 934593548.

It is a happy number.

It is not a de Polignac number, because 845395439 - 2²⁸ = 576959983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (845395039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31667 + ... + 51899.

It is an arithmetic number, because the mean of its divisors is an integer number (62158848).

Almost surely, 2^845395439 is an apocalyptic number.

845395439 is a deficient number, since it is larger than the sum of its proper divisors (149146129).

845395439 is a wasteful number, since it uses less digits than its factorization.

845395439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20414.

The product of its digits is 2332800, while the sum is 50.

The square root of 845395439 is about 29075.6846694966. The cubic root of 845395439 is about 945.5546472899.

The spelling of 845395439 in words is "eight hundred forty-five million, three hundred ninety-five thousand, four hundred thirty-nine".