83453799421 has 2 divisors, whose sum is σ = 83453799422. Its totient is φ = 83453799420.

The previous prime is 83453799343. The next prime is 83453799433. The reversal of 83453799421 is 12499735438.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77815892025 + 5637907396 = 278955^2 + 75086^2 .

It is a cyclic number.

It is not a de Polignac number, because 83453799421 - 2¹⁹ = 83453275133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83453799721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41726899710 + 41726899711.

It is an arithmetic number, because the mean of its divisors is an integer number (41726899711).

Almost surely, 2^83453799421 is an apocalyptic number.

It is an amenable number.

83453799421 is a deficient number, since it is larger than the sum of its proper divisors (1).

83453799421 is an equidigital number, since it uses as much as digits as its factorization.

83453799421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6531840, while the sum is 55.

The spelling of 83453799421 in words is "eighty-three billion, four hundred fifty-three million, seven hundred ninety-nine thousand, four hundred twenty-one".