43419137989 has 2 divisors, whose sum is σ = 43419137990. Its totient is φ = 43419137988.

The previous prime is 43419137959. The next prime is 43419137999. The reversal of 43419137989 is 98973191434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43403472225 + 15665764 = 208335^2 + 3958^2 .

It is a cyclic number.

It is not a de Polignac number, because 43419137989 - 2¹⁹ = 43418613701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43419137959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21709568994 + 21709568995.

It is an arithmetic number, because the mean of its divisors is an integer number (21709568995).

Almost surely, 2^43419137989 is an apocalyptic number.

It is an amenable number.

43419137989 is a deficient number, since it is larger than the sum of its proper divisors (1).

43419137989 is an equidigital number, since it uses as much as digits as its factorization.

43419137989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5878656, while the sum is 58.

The spelling of 43419137989 in words is "forty-three billion, four hundred nineteen million, one hundred thirty-seven thousand, nine hundred eighty-nine".