397881869093 has 16 divisors (see below), whose sum is σ = 438866334720. Its totient is φ = 359072352000.

The previous prime is 397881869069. The next prime is 397881869107. The reversal of 397881869093 is 390968188793.

It is a cyclic number.

It is not a de Polignac number, because 397881869093 - 2³² = 393586901797 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 (397881869393) 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 15 ways as a sum of consecutive naturals, for example, 3405833 + ... + 3520718.

It is an arithmetic number, because the mean of its divisors is an integer number (27429145920).

Almost surely, 2^397881869093 is an apocalyptic number.

It is an amenable number.

397881869093 is a deficient number, since it is larger than the sum of its proper divisors (40984465627).

397881869093 is a wasteful number, since it uses less digits than its factorization.

397881869093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6926708.

The product of its (nonzero) digits is 141087744, while the sum is 71.

The spelling of 397881869093 in words is "three hundred ninety-seven billion, eight hundred eighty-one million, eight hundred sixty-nine thousand, ninety-three".