43423121461 has 2 divisors, whose sum is σ = 43423121462. Its totient is φ = 43423121460.

The previous prime is 43423121459. The next prime is 43423121473. The reversal of 43423121461 is 16412132434.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42580322500 + 842798961 = 206350^2 + 29031^2 .

It is a cyclic number.

It is not a de Polignac number, because 43423121461 - 2¹ = 43423121459 is a prime.

Together with 43423121459, 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 (43423122461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21711560730 + 21711560731.

It is an arithmetic number, because the mean of its divisors is an integer number (21711560731).

Almost surely, 2^43423121461 is an apocalyptic number.

It is an amenable number.

43423121461 is a deficient number, since it is larger than the sum of its proper divisors (1).

43423121461 is an equidigital number, since it uses as much as digits as its factorization.

43423121461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 31.

Adding to 43423121461 its reverse (16412132434), we get a palindrome (59835253895).

The spelling of 43423121461 in words is "forty-three billion, four hundred twenty-three million, one hundred twenty-one thousand, four hundred sixty-one".