5540399 has 4 divisors (see below), whose sum is σ = 5550336. Its totient is φ = 5530464.

The previous prime is 5540393. The next prime is 5540411. The reversal of 5540399 is 9930455.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5540399 - 2¹⁶ = 5474863 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 (5540393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4079 + ... + 5264.

It is an arithmetic number, because the mean of its divisors is an integer number (1387584).

Almost surely, 2^5540399 is an apocalyptic number.

5540399 is a deficient number, since it is larger than the sum of its proper divisors (9937).

5540399 is an equidigital number, since it uses as much as digits as its factorization.

5540399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9936.

The product of its (nonzero) digits is 24300, while the sum is 35.

The square root of 5540399 is about 2353.8052170900. The cubic root of 5540399 is about 176.9485524025.

The spelling of 5540399 in words is "five million, five hundred forty thousand, three hundred ninety-nine".