1609916089 has 2 divisors, whose sum is σ = 1609916090. Its totient is φ = 1609916088.

The previous prime is 1609916071. The next prime is 1609916093. The reversal of 1609916089 is 9806199061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1225560064 + 384356025 = 35008^2 + 19605^2 .

It is a cyclic number.

It is not a de Polignac number, because 1609916089 - 2²³ = 1601527481 is a prime.

It is not a weakly prime, because it can be changed into another prime (1609913089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 804958044 + 804958045.

It is an arithmetic number, because the mean of its divisors is an integer number (804958045).

Almost surely, 2^1609916089 is an apocalyptic number.

It is an amenable number.

1609916089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1609916089 is an equidigital number, since it uses as much as digits as its factorization.

1609916089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 49.

The square root of 1609916089 is about 40123.7596568417. The cubic root of 1609916089 is about 1172.0183558281.

The spelling of 1609916089 in words is "one billion, six hundred nine million, nine hundred sixteen thousand, eighty-nine".