397796517 has 6 divisors (see below), whose sum is σ = 574594982. Its totient is φ = 265197672.

The previous prime is 397796471. The next prime is 397796527. The reversal of 397796517 is 715697793.

397796517 is a `hidden beast` number, since 39 + 7 + 7 + 96 + 517 = 666.

It can be written as a sum of positive squares in only one way, i.e., 256448196 + 141348321 = 16014^2 + 11889^2 .

It is not a de Polignac number, because 397796517 - 2⁶ = 397796453 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 (397796527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22099798 + ... + 22099815.

Almost surely, 2^397796517 is an apocalyptic number.

It is an amenable number.

397796517 is a deficient number, since it is larger than the sum of its proper divisors (176798465).

397796517 is a wasteful number, since it uses less digits than its factorization.

397796517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44199619 (or 44199616 counting only the distinct ones).

The product of its digits is 2500470, while the sum is 54.

The square root of 397796517 is about 19944.8368506739. The cubic root of 397796517 is about 735.4508576317.

The spelling of 397796517 in words is "three hundred ninety-seven million, seven hundred ninety-six thousand, five hundred seventeen".