13750503421 has 2 divisors, whose sum is σ = 13750503422. Its totient is φ = 13750503420.

The previous prime is 13750503419. The next prime is 13750503451. The reversal of 13750503421 is 12430505731.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11574747396 + 2175756025 = 107586^2 + 46645^2 .

It is a cyclic number.

It is not a de Polignac number, because 13750503421 - 2¹ = 13750503419 is a prime.

Together with 13750503419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13750503451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6875251710 + 6875251711.

It is an arithmetic number, because the mean of its divisors is an integer number (6875251711).

Almost surely, 2^13750503421 is an apocalyptic number.

It is an amenable number.

13750503421 is a deficient number, since it is larger than the sum of its proper divisors (1).

13750503421 is an equidigital number, since it uses as much as digits as its factorization.

13750503421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 31.

The spelling of 13750503421 in words is "thirteen billion, seven hundred fifty million, five hundred three thousand, four hundred twenty-one".