1609696057 has 2 divisors, whose sum is σ = 1609696058. Its totient is φ = 1609696056.

The previous prime is 1609696043. The next prime is 1609696141. The reversal of 1609696057 is 7506969061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1601280256 + 8415801 = 40016^2 + 2901^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1609696057 is a prime.

It is a super-2 number, since 2×1609696057² = 5182242791842694498, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1609696057.

It is not a weakly prime, because it can be changed into another prime (1609696157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 804848028 + 804848029.

It is an arithmetic number, because the mean of its divisors is an integer number (804848029).

Almost surely, 2^1609696057 is an apocalyptic number.

It is an amenable number.

1609696057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1609696057 is an equidigital number, since it uses as much as digits as its factorization.

1609696057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 612360, while the sum is 49.

The square root of 1609696057 is about 40121.0176466151. The cubic root of 1609696057 is about 1171.9649589888.

The spelling of 1609696057 in words is "one billion, six hundred nine million, six hundred ninety-six thousand, fifty-seven".