503382421 has 2 divisors, whose sum is σ = 503382422. Its totient is φ = 503382420.

The previous prime is 503382419. The next prime is 503382443. The reversal of 503382421 is 124283305.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 458559396 + 44823025 = 21414^2 + 6695^2 .

It is a cyclic number.

It is not a de Polignac number, because 503382421 - 2¹ = 503382419 is a prime.

Together with 503382419, 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 503382421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (503382401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251691210 + 251691211.

It is an arithmetic number, because the mean of its divisors is an integer number (251691211).

Almost surely, 2^503382421 is an apocalyptic number.

It is an amenable number.

503382421 is a deficient number, since it is larger than the sum of its proper divisors (1).

503382421 is an equidigital number, since it uses as much as digits as its factorization.

503382421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 503382421 is about 22436.1855269562. The cubic root of 503382421 is about 795.4862581696.

The spelling of 503382421 in words is "five hundred three million, three hundred eighty-two thousand, four hundred twenty-one".