397147 has 4 divisors (see below), whose sum is σ = 398736. Its totient is φ = 395560.

The previous prime is 397127. The next prime is 397151. The reversal of 397147 is 741793.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 397147 - 2¹⁵ = 364379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328 + ... + 949.

It is an arithmetic number, because the mean of its divisors is an integer number (99684).

2³⁹⁷¹⁴⁷ is an apocalyptic number.

397147 is a deficient number, since it is larger than the sum of its proper divisors (1589).

397147 is a wasteful number, since it uses less digits than its factorization.

397147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1588.

The product of its digits is 5292, while the sum is 31.

The square root of 397147 is about 630.1960012568. The cubic root of 397147 is about 73.5050361366.

The spelling of 397147 in words is "three hundred ninety-seven thousand, one hundred forty-seven".