540919805 has 4 divisors (see below), whose sum is σ = 649103772. Its totient is φ = 432735840.

The previous prime is 540919789. The next prime is 540919807. The reversal of 540919805 is 508919045.

It is a happy number.

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 97101316 + 443818489 = 9854^2 + 21067^2 .

It is not a de Polignac number, because 540919805 - 2⁴ = 540919789 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 (540919807) 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, 54091976 + ... + 54091985.

It is an arithmetic number, because the mean of its divisors is an integer number (162275943).

Almost surely, 2^540919805 is an apocalyptic number.

It is an amenable number.

540919805 is a deficient number, since it is larger than the sum of its proper divisors (108183967).

540919805 is a wasteful number, since it uses less digits than its factorization.

540919805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108183966.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 540919805 is about 23257.6827091609. The cubic root of 540919805 is about 814.7873810225.

The spelling of 540919805 in words is "five hundred forty million, nine hundred nineteen thousand, eight hundred five".