397697820699 has 8 divisors (see below), whose sum is σ = 530840765440. Its totient is φ = 264843378216.

The previous prime is 397697820683. The next prime is 397697820703. The reversal of 397697820699 is 996028796793.

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

It is not a de Polignac number, because 397697820699 - 2⁴ = 397697820683 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 397697820699.

It is not an unprimeable number, because it can be changed into a prime (397697870699) 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 7 ways as a sum of consecutive naturals, for example, 72122347 + ... + 72127860.

It is an arithmetic number, because the mean of its divisors is an integer number (66355095680).

Almost surely, 2^397697820699 is an apocalyptic number.

397697820699 is a deficient number, since it is larger than the sum of its proper divisors (133142944741).

397697820699 is a wasteful number, since it uses less digits than its factorization.

397697820699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144251129.

The product of its (nonzero) digits is 555532992, while the sum is 75.

The spelling of 397697820699 in words is "three hundred ninety-seven billion, six hundred ninety-seven million, eight hundred twenty thousand, six hundred ninety-nine".