515397 has 4 divisors (see below), whose sum is σ = 687200. Its totient is φ = 343596.

The previous prime is 515381. The next prime is 515401. The reversal of 515397 is 793515.

It is a happy number.

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.

It is not a de Polignac number, because 515397 - 2⁴ = 515381 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515357) 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, 85897 + ... + 85902.

It is an arithmetic number, because the mean of its divisors is an integer number (171800).

2⁵¹⁵³⁹⁷ is an apocalyptic number.

It is an amenable number.

515397 is a deficient number, since it is larger than the sum of its proper divisors (171803).

515397 is a wasteful number, since it uses less digits than its factorization.

515397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171802.

The product of its digits is 4725, while the sum is 30.

The square root of 515397 is about 717.9115544411. The cubic root of 515397 is about 80.1765372294.

The spelling of 515397 in words is "five hundred fifteen thousand, three hundred ninety-seven".