2005765427 has 2 divisors, whose sum is σ = 2005765428. Its totient is φ = 2005765426.

The previous prime is 2005765409. The next prime is 2005765507. The reversal of 2005765427 is 7245675002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2005765427 is a prime.

It is not a weakly prime, because it can be changed into another prime (2005765327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1002882713 + 1002882714.

It is an arithmetic number, because the mean of its divisors is an integer number (1002882714).

Almost surely, 2^2005765427 is an apocalyptic number.

2005765427 is a deficient number, since it is larger than the sum of its proper divisors (1).

2005765427 is an equidigital number, since it uses as much as digits as its factorization.

2005765427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 117600, while the sum is 38.

The square root of 2005765427 is about 44785.7725957697. The cubic root of 2005765427 is about 1261.1305522286.

The spelling of 2005765427 in words is "two billion, five million, seven hundred sixty-five thousand, four hundred twenty-seven".