397045765 has 8 divisors (see below), whose sum is σ = 478082808. Its totient is φ = 316551360.

The previous prime is 397045741. The next prime is 397045777. The reversal of 397045765 is 567540793.

It can be written as a sum of positive squares in 4 ways, for example, as 62631396 + 334414369 = 7914^2 + 18287^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 397045765 - 2⁷ = 397045637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134046 + ... + 136975.

It is an arithmetic number, because the mean of its divisors is an integer number (59760351).

Almost surely, 2^397045765 is an apocalyptic number.

It is an amenable number.

397045765 is a deficient number, since it is larger than the sum of its proper divisors (81037043).

397045765 is a wasteful number, since it uses less digits than its factorization.

397045765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271319.

The product of its (nonzero) digits is 793800, while the sum is 46.

The square root of 397045765 is about 19926.0072518305. The cubic root of 397045765 is about 734.9878999042.

The spelling of 397045765 in words is "three hundred ninety-seven million, forty-five thousand, seven hundred sixty-five".