397683365 has 4 divisors (see below), whose sum is σ = 477220044. Its totient is φ = 318146688.

The previous prime is 397683353. The next prime is 397683367. The reversal of 397683365 is 563386793.

It is a Cunningham number, because it is equal to 19942²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 143185156 + 254498209 = 11966^2 + 15953^2 .

It is a cyclic number.

It is not a de Polignac number, because 397683365 - 2⁶ = 397683301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397683367) 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, 39768332 + ... + 39768341.

It is an arithmetic number, because the mean of its divisors is an integer number (119305011).

Almost surely, 2^397683365 is an apocalyptic number.

It is an amenable number.

397683365 is a deficient number, since it is larger than the sum of its proper divisors (79536679).

397683365 is an equidigital number, since it uses as much as digits as its factorization.

397683365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79536678.

The product of its digits is 2449440, while the sum is 50.

The square root of 397683365 is about 19942.0000250727. Note that the first 4 decimals coincide. The cubic root of 397683365 is about 735.3811187715.

The spelling of 397683365 in words is "three hundred ninety-seven million, six hundred eighty-three thousand, three hundred sixty-five".