1617681073 has 2 divisors, whose sum is σ = 1617681074. Its totient is φ = 1617681072.

The previous prime is 1617681061. The next prime is 1617681083. The reversal of 1617681073 is 3701867161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1613387889 + 4293184 = 40167^2 + 2072^2 .

It is an emirp because it is prime and its reverse (3701867161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1617681073 - 2¹⁷ = 1617550001 is a prime.

It is not a weakly prime, because it can be changed into another prime (1617681083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 808840536 + 808840537.

It is an arithmetic number, because the mean of its divisors is an integer number (808840537).

Almost surely, 2^1617681073 is an apocalyptic number.

It is an amenable number.

1617681073 is a deficient number, since it is larger than the sum of its proper divisors (1).

1617681073 is an equidigital number, since it uses as much as digits as its factorization.

1617681073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 1617681073 is about 40220.4061764672. The cubic root of 1617681073 is about 1173.8996363390.

The spelling of 1617681073 in words is "one billion, six hundred seventeen million, six hundred eighty-one thousand, seventy-three".