540979531 has 2 divisors, whose sum is σ = 540979532. Its totient is φ = 540979530.

The previous prime is 540979519. The next prime is 540979561. The reversal of 540979531 is 135979045.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 540979531 - 2⁵ = 540979499 is a prime.

It is a super-2 number, since 2×540979531² = 585317705921959922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (540979561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270489765 + 270489766.

It is an arithmetic number, because the mean of its divisors is an integer number (270489766).

Almost surely, 2^540979531 is an apocalyptic number.

540979531 is a deficient number, since it is larger than the sum of its proper divisors (1).

540979531 is an equidigital number, since it uses as much as digits as its factorization.

540979531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 170100, while the sum is 43.

The square root of 540979531 is about 23258.9666795410. The cubic root of 540979531 is about 814.8173683389.

The spelling of 540979531 in words is "five hundred forty million, nine hundred seventy-nine thousand, five hundred thirty-one".