501397 has 4 divisors (see below), whose sum is σ = 539980. Its totient is φ = 462816.

The previous prime is 501383. The next prime is 501401. The reversal of 501397 is 793105.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 793105 = 5 ⋅158621.

It can be written as a sum of positive squares in 2 ways, for example, as 194481 + 306916 = 441^2 + 554^2 .

It is a cyclic number.

It is not a de Polignac number, because 501397 - 2¹¹ = 499349 is a prime.

It is a Duffinian number.

501397 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501317) 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, 19272 + ... + 19297.

It is an arithmetic number, because the mean of its divisors is an integer number (134995).

2⁵⁰¹³⁹⁷ is an apocalyptic number.

It is an amenable number.

501397 is a deficient number, since it is larger than the sum of its proper divisors (38583).

501397 is a wasteful number, since it uses less digits than its factorization.

501397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38582.

The product of its (nonzero) digits is 945, while the sum is 25.

The square root of 501397 is about 708.0939203241. The cubic root of 501397 is about 79.4439038366.

It can be divided in two parts, 501 and 397, that added together give a palindrome (898).

The spelling of 501397 in words is "five hundred one thousand, three hundred ninety-seven".