540643369 has 4 divisors (see below), whose sum is σ = 617878144. Its totient is φ = 463408596.

The previous prime is 540643349. The next prime is 540643387. The reversal of 540643369 is 963346045.

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.

It is not a de Polignac number, because 540643369 - 2¹⁵ = 540610601 is a prime.

It is a super-2 number, since 2×540643369² = 584590504887340322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (540643349) 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, 38617377 + ... + 38617390.

It is an arithmetic number, because the mean of its divisors is an integer number (154469536).

Almost surely, 2^540643369 is an apocalyptic number.

It is an amenable number.

540643369 is a deficient number, since it is larger than the sum of its proper divisors (77234775).

540643369 is an equidigital number, since it uses as much as digits as its factorization.

540643369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77234774.

The product of its (nonzero) digits is 233280, while the sum is 40.

The square root of 540643369 is about 23251.7390532407. The cubic root of 540643369 is about 814.6485588766.

The spelling of 540643369 in words is "five hundred forty million, six hundred forty-three thousand, three hundred sixty-nine".