397513 has 4 divisors (see below), whose sum is σ = 410368. Its totient is φ = 384660.

The previous prime is 397493. The next prime is 397517. The reversal of 397513 is 315793.

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: 315793 = 47 ⋅6719.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397513 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6381 + ... + 6442.

It is an arithmetic number, because the mean of its divisors is an integer number (102592).

2³⁹⁷⁵¹³ is an apocalyptic number.

It is an amenable number.

397513 is a deficient number, since it is larger than the sum of its proper divisors (12855).

397513 is a wasteful number, since it uses less digits than its factorization.

397513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12854.

The product of its digits is 2835, while the sum is 28.

The square root of 397513 is about 630.4863202322. The cubic root of 397513 is about 73.5276092923.

The spelling of 397513 in words is "three hundred ninety-seven thousand, five hundred thirteen".