43422620534989 has 2 divisors, whose sum is σ = 43422620534990. Its totient is φ = 43422620534988.

The previous prime is 43422620534939. The next prime is 43422620535037. The reversal of 43422620534989 is 98943502622434.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43384840838089 + 37779696900 = 6586717^2 + 194370^2 .

It is a cyclic number.

It is not a de Polignac number, because 43422620534989 - 2⁹ = 43422620534477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43422620534939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21711310267494 + 21711310267495.

It is an arithmetic number, because the mean of its divisors is an integer number (21711310267495).

Almost surely, 2^{43422620534989} is an apocalyptic number.

It is an amenable number.

43422620534989 is a deficient number, since it is larger than the sum of its proper divisors (1).

43422620534989 is an equidigital number, since it uses as much as digits as its factorization.

43422620534989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 89579520, while the sum is 61.

The spelling of 43422620534989 in words is "forty-three trillion, four hundred twenty-two billion, six hundred twenty million, five hundred thirty-four thousand, nine hundred eighty-nine".