397854567 has 24 divisors (see below), whose sum is σ = 648545040. Its totient is φ = 232807680.

The previous prime is 397854559. The next prime is 397854571. The reversal of 397854567 is 765458793.

397854567 is a `hidden beast` number, since 3 + 9 + 78 + 5 + 4 + 567 = 666.

It is not a de Polignac number, because 397854567 - 2³ = 397854559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397854367) 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 23 ways as a sum of consecutive naturals, for example, 66418 + ... + 72159.

It is an arithmetic number, because the mean of its divisors is an integer number (27022710).

Almost surely, 2^397854567 is an apocalyptic number.

397854567 is a deficient number, since it is larger than the sum of its proper divisors (250690473).

397854567 is a wasteful number, since it uses less digits than its factorization.

397854567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138623 (or 138620 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 54.

The square root of 397854567 is about 19946.2920614334. The cubic root of 397854567 is about 735.4866303982.

The spelling of 397854567 in words is "three hundred ninety-seven million, eight hundred fifty-four thousand, five hundred sixty-seven".