43770012427 has 2 divisors, whose sum is σ = 43770012428. Its totient is φ = 43770012426.

The previous prime is 43770012379. The next prime is 43770012487. The reversal of 43770012427 is 72421007734.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43770012427 is a prime.

It is not a weakly prime, because it can be changed into another prime (43770012487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21885006213 + 21885006214.

It is an arithmetic number, because the mean of its divisors is an integer number (21885006214).

Almost surely, 2^43770012427 is an apocalyptic number.

43770012427 is a deficient number, since it is larger than the sum of its proper divisors (1).

43770012427 is an equidigital number, since it uses as much as digits as its factorization.

43770012427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65856, while the sum is 37.

The spelling of 43770012427 in words is "forty-three billion, seven hundred seventy million, twelve thousand, four hundred twenty-seven".