43400013989 has 2 divisors, whose sum is σ = 43400013990. Its totient is φ = 43400013988.

The previous prime is 43400013953. The next prime is 43400014039. The reversal of 43400013989 is 98931000434.

43400013989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31224657025 + 12175356964 = 176705^2 + 110342^2 .

It is a cyclic number.

It is not a de Polignac number, because 43400013989 - 2²⁰ = 43398965413 is a prime.

It is a super-2 number, since 2×43400013989² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43400013089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21700006994 + 21700006995.

It is an arithmetic number, because the mean of its divisors is an integer number (21700006995).

Almost surely, 2^43400013989 is an apocalyptic number.

It is an amenable number.

43400013989 is a deficient number, since it is larger than the sum of its proper divisors (1).

43400013989 is an equidigital number, since it uses as much as digits as its factorization.

43400013989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 41.

The spelling of 43400013989 in words is "forty-three billion, four hundred million, thirteen thousand, nine hundred eighty-nine".