55840003 has 2 divisors, whose sum is σ = 55840004. Its totient is φ = 55840002.

The previous prime is 55839977. The next prime is 55840013. The reversal of 55840003 is 30004855.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55840003 - 2²¹ = 53742851 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55840003.

It is not a weakly prime, because it can be changed into another prime (55840013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27920001 + 27920002.

It is an arithmetic number, because the mean of its divisors is an integer number (27920002).

Almost surely, 2^55840003 is an apocalyptic number.

55840003 is a deficient number, since it is larger than the sum of its proper divisors (1).

55840003 is an equidigital number, since it uses as much as digits as its factorization.

55840003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 55840003 is about 7472.6168776407. The cubic root of 55840003 is about 382.2215279862.

Adding to 55840003 its reverse (30004855), we get a palindrome (85844858).

The spelling of 55840003 in words is "fifty-five million, eight hundred forty thousand, three".