43400370029 has 2 divisors, whose sum is σ = 43400370030. Its totient is φ = 43400370028.

The previous prime is 43400370017. The next prime is 43400370049. The reversal of 43400370029 is 92007300434.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42231072004 + 1169298025 = 205502^2 + 34195^2 .

It is a cyclic number.

It is not a de Polignac number, because 43400370029 - 2¹² = 43400365933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43400369977 and 43400370004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43400370049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21700185014 + 21700185015.

It is an arithmetic number, because the mean of its divisors is an integer number (21700185015).

Almost surely, 2^43400370029 is an apocalyptic number.

It is an amenable number.

43400370029 is a deficient number, since it is larger than the sum of its proper divisors (1).

43400370029 is an equidigital number, since it uses as much as digits as its factorization.

43400370029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 32.

The spelling of 43400370029 in words is "forty-three billion, four hundred million, three hundred seventy thousand, twenty-nine".