43400340671 has 2 divisors, whose sum is σ = 43400340672. Its totient is φ = 43400340670.

The previous prime is 43400340647. The next prime is 43400340733. The reversal of 43400340671 is 17604300434.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43400340671 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43400340271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21700170335 + 21700170336.

It is an arithmetic number, because the mean of its divisors is an integer number (21700170336).

Almost surely, 2^43400340671 is an apocalyptic number.

43400340671 is a deficient number, since it is larger than the sum of its proper divisors (1).

43400340671 is an equidigital number, since it uses as much as digits as its factorization.

43400340671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 32.

The spelling of 43400340671 in words is "forty-three billion, four hundred million, three hundred forty thousand, six hundred seventy-one".