540503123 has 4 divisors (see below), whose sum is σ = 553686168. Its totient is φ = 527320080.

The previous prime is 540503113. The next prime is 540503213. The reversal of 540503123 is 321305045.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321305045 = 5 ⋅64261009.

It is a cyclic number.

It is not a de Polignac number, because 540503123 - 2¹² = 540499027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (540503113) 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, 6591461 + ... + 6591542.

It is an arithmetic number, because the mean of its divisors is an integer number (138421542).

Almost surely, 2^540503123 is an apocalyptic number.

540503123 is a deficient number, since it is larger than the sum of its proper divisors (13183045).

540503123 is a wasteful number, since it uses less digits than its factorization.

540503123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13183044.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 540503123 is about 23248.7230402016. The cubic root of 540503123 is about 814.5781112772.

Adding to 540503123 its reverse (321305045), we get a palindrome (861808168).

The spelling of 540503123 in words is "five hundred forty million, five hundred three thousand, one hundred twenty-three".