397199290657 has 8 divisors (see below), whose sum is σ = 438186084840. Its totient is φ = 357702925440.

The previous prime is 397199290643. The next prime is 397199290711. The reversal of 397199290657 is 756092991793.

It can be written as a sum of positive squares in 4 ways, for example, as 20198378641 + 377000912016 = 142121^2 + 614004^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 397199290657 - 2¹¹ = 397199288609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 397199290592 and 397199290601.

It is not an unprimeable number, because it can be changed into a prime (397199290457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372606682 + ... + 372607747.

It is an arithmetic number, because the mean of its divisors is an integer number (54773260605).

Almost surely, 2^397199290657 is an apocalyptic number.

It is an amenable number.

397199290657 is a deficient number, since it is larger than the sum of its proper divisors (40986794183).

397199290657 is a wasteful number, since it uses less digits than its factorization.

397199290657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745214483.

The product of its (nonzero) digits is 57868020, while the sum is 67.

The spelling of 397199290657 in words is "three hundred ninety-seven billion, one hundred ninety-nine million, two hundred ninety thousand, six hundred fifty-seven".