397303087185 has 20 divisors (see below), whose sum is σ = 712202571828. Its totient is φ = 211894979616.

The previous prime is 397303087183. The next prime is 397303087193. The reversal of 397303087185 is 581780303793.

It can be written as a sum of positive squares in 2 ways, for example, as 201302974224 + 196000112961 = 448668^2 + 442719^2 .

It is not a de Polignac number, because 397303087185 - 2¹ = 397303087183 is a prime.

It is a super-2 number, since 2×397303087185² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (397303087183) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 490497234 + ... + 490498043.

Almost surely, 2^397303087185 is an apocalyptic number.

It is an amenable number.

397303087185 is a deficient number, since it is larger than the sum of its proper divisors (314899484643).

397303087185 is an equidigital number, since it uses as much as digits as its factorization.

397303087185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980995294 (or 980995285 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 54.

The spelling of 397303087185 in words is "three hundred ninety-seven billion, three hundred three million, eighty-seven thousand, one hundred eighty-five".