397130365 has 4 divisors (see below), whose sum is σ = 476556444. Its totient is φ = 317704288.

The previous prime is 397130359. The next prime is 397130369. The reversal of 397130365 is 563031793.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 563031793 = 12647 ⋅44519.

It can be written as a sum of positive squares in 2 ways, for example, as 66945124 + 330185241 = 8182^2 + 18171^2 .

It is a cyclic number.

It is not a de Polignac number, because 397130365 - 2¹⁷ = 396999293 is a prime.

It is a super-4 number, since 4×397130365⁴ (a number of 35 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397130369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39713032 + ... + 39713041.

It is an arithmetic number, because the mean of its divisors is an integer number (119139111).

Almost surely, 2^397130365 is an apocalyptic number.

It is an amenable number.

397130365 is a deficient number, since it is larger than the sum of its proper divisors (79426079).

397130365 is an equidigital number, since it uses as much as digits as its factorization.

397130365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79426078.

The product of its (nonzero) digits is 51030, while the sum is 37.

The square root of 397130365 is about 19928.1299925507. The cubic root of 397130365 is about 735.0400983877.

The spelling of 397130365 in words is "three hundred ninety-seven million, one hundred thirty thousand, three hundred sixty-five".