397849824409 has 16 divisors (see below), whose sum is σ = 415639573456. Its totient is φ = 380440800000.

The previous prime is 397849824397. The next prime is 397849824439. The reversal of 397849824409 is 904428948793.

It can be written as a sum of positive squares in 8 ways, for example, as 288048784 + 397561775625 = 16972^2 + 630525^2 .

It is a cyclic number.

It is not a de Polignac number, because 397849824409 - 2⁵ = 397849824377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397849824439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2720659 + ... + 2863159.

It is an arithmetic number, because the mean of its divisors is an integer number (25977473341).

Almost surely, 2^397849824409 is an apocalyptic number.

It is an amenable number.

397849824409 is a deficient number, since it is larger than the sum of its proper divisors (17789749047).

397849824409 is a wasteful number, since it uses less digits than its factorization.

397849824409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143836.

The product of its (nonzero) digits is 125411328, while the sum is 67.

The spelling of 397849824409 in words is "three hundred ninety-seven billion, eight hundred forty-nine million, eight hundred twenty-four thousand, four hundred nine".