397149 has 4 divisors (see below), whose sum is σ = 529536. Its totient is φ = 264764.

The previous prime is 397127. The next prime is 397151. The reversal of 397149 is 941793.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 941793 = 3 ⋅313931.

It is a cyclic number.

It is not a de Polignac number, because 397149 - 2⁹ = 396637 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397549) 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, 66189 + ... + 66194.

It is an arithmetic number, because the mean of its divisors is an integer number (132384).

2³⁹⁷¹⁴⁹ is an apocalyptic number.

It is an amenable number.

397149 is a deficient number, since it is larger than the sum of its proper divisors (132387).

397149 is a wasteful number, since it uses less digits than its factorization.

397149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132386.

The product of its digits is 6804, while the sum is 33.

The square root of 397149 is about 630.1975880627. The cubic root of 397149 is about 73.5051595249.

Subtracting 397149 from its reverse (941793), we obtain a square (544644 = 738²).

The spelling of 397149 in words is "three hundred ninety-seven thousand, one hundred forty-nine".