397848565 has 4 divisors (see below), whose sum is σ = 477418284. Its totient is φ = 318278848.

The previous prime is 397848559. The next prime is 397848617. The reversal of 397848565 is 565848793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 565848793 = 151 ⋅3747343.

It can be written as a sum of positive squares in 2 ways, for example, as 150038001 + 247810564 = 12249^2 + 15742^2 .

It is a cyclic number.

It is not a de Polignac number, because 397848565 - 2³ = 397848557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39784852 + ... + 39784861.

It is an arithmetic number, because the mean of its divisors is an integer number (119354571).

Almost surely, 2^397848565 is an apocalyptic number.

It is an amenable number.

397848565 is a deficient number, since it is larger than the sum of its proper divisors (79569719).

397848565 is an equidigital number, since it uses as much as digits as its factorization.

397848565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79569718.

The product of its digits is 7257600, while the sum is 55.

The square root of 397848565 is about 19946.1416068371. The cubic root of 397848565 is about 735.4829318834.

The spelling of 397848565 in words is "three hundred ninety-seven million, eight hundred forty-eight thousand, five hundred sixty-five".