540614621 has 4 divisors (see below), whose sum is σ = 541352892. Its totient is φ = 539876352.

The previous prime is 540614597. The next prime is 540614623. The reversal of 540614621 is 126416045.

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 290532025 + 250082596 = 17045^2 + 15814^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-540614621 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 (540614623) 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, 368036 + ... + 369501.

It is an arithmetic number, because the mean of its divisors is an integer number (135338223).

Almost surely, 2^540614621 is an apocalyptic number.

It is an amenable number.

540614621 is a deficient number, since it is larger than the sum of its proper divisors (738271).

540614621 is an equidigital number, since it uses as much as digits as its factorization.

540614621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738270.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 540614621 is about 23251.1208547029. The cubic root of 540614621 is about 814.6341193321.

The spelling of 540614621 in words is "five hundred forty million, six hundred fourteen thousand, six hundred twenty-one".