1609169801 has 2 divisors, whose sum is σ = 1609169802. Its totient is φ = 1609169800.

The previous prime is 1609169759. The next prime is 1609169839. The reversal of 1609169801 is 1089619061.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1528888201 + 80281600 = 39101^2 + 8960^2 .

It is an emirp because it is prime and its reverse (1089619061) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 1086916091 and 1906196801.

It is a cyclic number.

It is not a de Polignac number, because 1609169801 - 2²⁶ = 1542060937 is a prime.

It is not a weakly prime, because it can be changed into another prime (1609169851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 804584900 + 804584901.

It is an arithmetic number, because the mean of its divisors is an integer number (804584901).

Almost surely, 2^1609169801 is an apocalyptic number.

It is an amenable number.

1609169801 is a deficient number, since it is larger than the sum of its proper divisors (1).

1609169801 is an equidigital number, since it uses as much as digits as its factorization.

1609169801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 1609169801 is about 40114.4587524249. The cubic root of 1609169801 is about 1171.8372287024.

The spelling of 1609169801 in words is "one billion, six hundred nine million, one hundred sixty-nine thousand, eight hundred one".