43980935389 has 2 divisors, whose sum is σ = 43980935390. Its totient is φ = 43980935388.

The previous prime is 43980935293. The next prime is 43980935407. The reversal of 43980935389 is 98353908934.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22580171289 + 21400764100 = 150267^2 + 146290^2 .

It is a cyclic number.

It is not a de Polignac number, because 43980935389 - 2¹⁷ = 43980804317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43980935189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21990467694 + 21990467695.

It is an arithmetic number, because the mean of its divisors is an integer number (21990467695).

Almost surely, 2^43980935389 is an apocalyptic number.

It is an amenable number.

43980935389 is a deficient number, since it is larger than the sum of its proper divisors (1).

43980935389 is an equidigital number, since it uses as much as digits as its factorization.

43980935389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25194240, while the sum is 61.

The spelling of 43980935389 in words is "forty-three billion, nine hundred eighty million, nine hundred thirty-five thousand, three hundred eighty-nine".