1609042271 has 2 divisors, whose sum is σ = 1609042272. Its totient is φ = 1609042270.

The previous prime is 1609042247. The next prime is 1609042307. The reversal of 1609042271 is 1722409061.

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-1609042271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1609042471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 804521135 + 804521136.

It is an arithmetic number, because the mean of its divisors is an integer number (804521136).

Almost surely, 2^1609042271 is an apocalyptic number.

1609042271 is a deficient number, since it is larger than the sum of its proper divisors (1).

1609042271 is an equidigital number, since it uses as much as digits as its factorization.

1609042271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 1609042271 is about 40112.8691444529. The cubic root of 1609042271 is about 1171.8062710516.

The spelling of 1609042271 in words is "one billion, six hundred nine million, forty-two thousand, two hundred seventy-one".