397792805 has 8 divisors (see below), whose sum is σ = 477819672. Its totient is φ = 317922048.

The previous prime is 397792799. The next prime is 397792817. The reversal of 397792805 is 508297793.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 247558756 + 150234049 = 15734^2 + 12257^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 397792805 - 2¹² = 397788709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 33344 + ... + 43673.

It is an arithmetic number, because the mean of its divisors is an integer number (59727459).

Almost surely, 2^397792805 is an apocalyptic number.

It is an amenable number.

397792805 is a deficient number, since it is larger than the sum of its proper divisors (80026867).

397792805 is a wasteful number, since it uses less digits than its factorization.

397792805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78055.

The product of its (nonzero) digits is 952560, while the sum is 50.

The square root of 397792805 is about 19944.7437937919. The cubic root of 397792805 is about 735.4485700282.

The spelling of 397792805 in words is "three hundred ninety-seven million, seven hundred ninety-two thousand, eight hundred five".