397487 has 4 divisors (see below), whose sum is σ = 402360. Its totient is φ = 392616.

The previous prime is 397469. The next prime is 397489. The reversal of 397487 is 784793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 784793 = 43 ⋅18251.

It is a cyclic number.

It is not a de Polignac number, because 397487 - 2¹⁴ = 381103 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 397487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2312 + ... + 2477.

It is an arithmetic number, because the mean of its divisors is an integer number (100590).

2³⁹⁷⁴⁸⁷ is an apocalyptic number.

397487 is a deficient number, since it is larger than the sum of its proper divisors (4873).

397487 is an equidigital number, since it uses as much as digits as its factorization.

397487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4872.

The product of its digits is 42336, while the sum is 38.

The square root of 397487 is about 630.4657008910. The cubic root of 397487 is about 73.5260061921.

The spelling of 397487 in words is "three hundred ninety-seven thousand, four hundred eighty-seven".