380505503 has 4 divisors (see below), whose sum is σ = 434863440. Its totient is φ = 326147568.

The previous prime is 380505487. The next prime is 380505511. The reversal of 380505503 is 305505083.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 305505083 = 13 ⋅23500391.

It is a cyclic number.

It is not a de Polignac number, because 380505503 - 2⁴ = 380505487 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 (380505523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27178958 + ... + 27178971.

It is an arithmetic number, because the mean of its divisors is an integer number (108715860).

Almost surely, 2^380505503 is an apocalyptic number.

380505503 is a deficient number, since it is larger than the sum of its proper divisors (54357937).

380505503 is an equidigital number, since it uses as much as digits as its factorization.

380505503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54357936.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 380505503 is about 19506.5502588233. The cubic root of 380505503 is about 724.6366807426.

The spelling of 380505503 in words is "three hundred eighty million, five hundred five thousand, five hundred three".