540197 has 4 divisors (see below), whose sum is σ = 617376. Its totient is φ = 463020.

The previous prime is 540187. The next prime is 540203. The reversal of 540197 is 791045.

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: 791045 = 5 ⋅158209.

It is a cyclic number.

It is not a de Polignac number, because 540197 - 2⁴ = 540181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540157) 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, 38579 + ... + 38592.

It is an arithmetic number, because the mean of its divisors is an integer number (154344).

2⁵⁴⁰¹⁹⁷ is an apocalyptic number.

It is an amenable number.

540197 is a deficient number, since it is larger than the sum of its proper divisors (77179).

540197 is an equidigital number, since it uses as much as digits as its factorization.

540197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77178.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 540197 is about 734.9809521341. The cubic root of 540197 is about 81.4424298915.

It can be divided in two parts, 540 and 197, that added together give a palindrome (737).

The spelling of 540197 in words is "five hundred forty thousand, one hundred ninety-seven".