397871336913 has 16 divisors (see below), whose sum is σ = 570908923776. Its totient is φ = 245552221440.

The previous prime is 397871336881. The next prime is 397871336959. The reversal of 397871336913 is 319633178793.

It is not a de Polignac number, because 397871336913 - 2⁵ = 397871336881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (397871336983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63942781 + ... + 63949002.

It is an arithmetic number, because the mean of its divisors is an integer number (35681807736).

Almost surely, 2^397871336913 is an apocalyptic number.

It is an amenable number.

397871336913 is a deficient number, since it is larger than the sum of its proper divisors (173037586863).

397871336913 is a wasteful number, since it uses less digits than its factorization.

397871336913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127891864.

The product of its digits is 15431472, while the sum is 60.

The spelling of 397871336913 in words is "three hundred ninety-seven billion, eight hundred seventy-one million, three hundred thirty-six thousand, nine hundred thirteen".