540723217 has 4 divisors (see below), whose sum is σ = 555337396. Its totient is φ = 526109040.

The previous prime is 540723137. The next prime is 540723247. The reversal of 540723217 is 712327045.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 356605456 + 184117761 = 18884^2 + 13569^2 .

It is a cyclic number.

It is not a de Polignac number, because 540723217 - 2⁷ = 540723089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (540723247) 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, 7307034 + ... + 7307107.

It is an arithmetic number, because the mean of its divisors is an integer number (138834349).

Almost surely, 2^540723217 is an apocalyptic number.

It is an amenable number.

540723217 is a deficient number, since it is larger than the sum of its proper divisors (14614179).

540723217 is a wasteful number, since it uses less digits than its factorization.

540723217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14614178.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 540723217 is about 23253.4560227077. The cubic root of 540723217 is about 814.6886622422.

The spelling of 540723217 in words is "five hundred forty million, seven hundred twenty-three thousand, two hundred seventeen".