9503743421 has 2 divisors, whose sum is σ = 9503743422. Its totient is φ = 9503743420.

The previous prime is 9503743387. The next prime is 9503743471. The reversal of 9503743421 is 1243473059.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5981320921 + 3522422500 = 77339^2 + 59350^2 .

It is an emirp because it is prime and its reverse (1243473059) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9503743421 - 2¹⁸ = 9503481277 is a prime.

It is a super-2 number, since 2×9503743421² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9503743471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4751871710 + 4751871711.

It is an arithmetic number, because the mean of its divisors is an integer number (4751871711).

Almost surely, 2^9503743421 is an apocalyptic number.

It is an amenable number.

9503743421 is a deficient number, since it is larger than the sum of its proper divisors (1).

9503743421 is an equidigital number, since it uses as much as digits as its factorization.

9503743421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 9503743421 is about 97487.1449012638. The cubic root of 9503743421 is about 2118.1899392976.

The spelling of 9503743421 in words is "nine billion, five hundred three million, seven hundred forty-three thousand, four hundred twenty-one".