503401123 has 2 divisors, whose sum is σ = 503401124. Its totient is φ = 503401122.

The previous prime is 503401121. The next prime is 503401231. The reversal of 503401123 is 321104305.

Together with next prime (503401231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 503401123 - 2¹ = 503401121 is a prime.

It is a super-2 number, since 2×503401123² = 506825381275322258, which contains 22 as substring.

Together with 503401121, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 503401123.

It is not a weakly prime, because it can be changed into another prime (503401121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251700561 + 251700562.

It is an arithmetic number, because the mean of its divisors is an integer number (251700562).

Almost surely, 2^503401123 is an apocalyptic number.

503401123 is a deficient number, since it is larger than the sum of its proper divisors (1).

503401123 is an equidigital number, since it uses as much as digits as its factorization.

503401123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 503401123 is about 22436.6023051620. The cubic root of 503401123 is about 795.4961095266.

Adding to 503401123 its reverse (321104305), we get a palindrome (824505428).

The spelling of 503401123 in words is "five hundred three million, four hundred one thousand, one hundred twenty-three".