540590399 has 4 divisors (see below), whose sum is σ = 541541040. Its totient is φ = 539639760.

The previous prime is 540590383. The next prime is 540590417. The reversal of 540590399 is 993095045.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993095045 = 5 ⋅198619009.

It is a cyclic number.

It is not a de Polignac number, because 540590399 - 2⁴ = 540590383 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 (540590899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 474467 + ... + 475604.

It is an arithmetic number, because the mean of its divisors is an integer number (135385260).

Almost surely, 2^540590399 is an apocalyptic number.

540590399 is a deficient number, since it is larger than the sum of its proper divisors (950641).

540590399 is an equidigital number, since it uses as much as digits as its factorization.

540590399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950640.

The product of its (nonzero) digits is 218700, while the sum is 44.

The square root of 540590399 is about 23250.5999707534. The cubic root of 540590399 is about 814.6219527094.

The spelling of 540590399 in words is "five hundred forty million, five hundred ninety thousand, three hundred ninety-nine".