397873487 has 8 divisors (see below), whose sum is σ = 434311680. Its totient is φ = 361479960.

The previous prime is 397873477. The next prime is 397873493. The reversal of 397873487 is 784378793.

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

It is a cyclic number.

It is not a de Polignac number, because 397873487 - 2¹⁰ = 397872463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397873477) 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, 9068 + ... + 29630.

It is an arithmetic number, because the mean of its divisors is an integer number (54288960).

Almost surely, 2^397873487 is an apocalyptic number.

397873487 is a deficient number, since it is larger than the sum of its proper divisors (36438193).

397873487 is a wasteful number, since it uses less digits than its factorization.

397873487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22333.

The product of its digits is 7112448, while the sum is 56.

The square root of 397873487 is about 19946.7663294079. The cubic root of 397873487 is about 735.4982889184.

The spelling of 397873487 in words is "three hundred ninety-seven million, eight hundred seventy-three thousand, four hundred eighty-seven".