633743953421 has 2 divisors, whose sum is σ = 633743953422. Its totient is φ = 633743953420.

The previous prime is 633743953397. The next prime is 633743953471. The reversal of 633743953421 is 124359347336.

It is an a-pointer prime, because the next prime (633743953471) can be obtained adding 633743953421 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 349080088900 + 284663864521 = 590830^2 + 533539^2 .

It is a cyclic number.

It is not a de Polignac number, because 633743953421 - 2¹⁸ = 633743691277 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 633743953421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (633743953471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316871976710 + 316871976711.

It is an arithmetic number, because the mean of its divisors is an integer number (316871976711).

Almost surely, 2^633743953421 is an apocalyptic number.

It is an amenable number.

633743953421 is a deficient number, since it is larger than the sum of its proper divisors (1).

633743953421 is an equidigital number, since it uses as much as digits as its factorization.

633743953421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4898880, while the sum is 50.

The spelling of 633743953421 in words is "six hundred thirty-three billion, seven hundred forty-three million, nine hundred fifty-three thousand, four hundred twenty-one".