397854439047 has 48 divisors (see below), whose sum is σ = 647553973248. Its totient is φ = 233549870400.

The previous prime is 397854439039. The next prime is 397854439051. The reversal of 397854439047 is 740934458793.

397854439047 is a `hidden beast` number, since 3 + 97 + 85 + 44 + 390 + 47 = 666.

It is not a de Polignac number, because 397854439047 - 2³ = 397854439039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397854439007) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 786172 + ... + 1189022.

It is an arithmetic number, because the mean of its divisors is an integer number (13490707776).

Almost surely, 2^397854439047 is an apocalyptic number.

397854439047 is a deficient number, since it is larger than the sum of its proper divisors (249699534201).

397854439047 is a wasteful number, since it uses less digits than its factorization.

397854439047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403260 (or 403257 counting only the distinct ones).

The product of its (nonzero) digits is 91445760, while the sum is 63.

The spelling of 397854439047 in words is "three hundred ninety-seven billion, eight hundred fifty-four million, four hundred thirty-nine thousand, forty-seven".