1617681061 has 2 divisors, whose sum is σ = 1617681062. Its totient is φ = 1617681060.

The previous prime is 1617681059. The next prime is 1617681073. The reversal of 1617681061 is 1601867161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1597520961 + 20160100 = 39969^2 + 4490^2 .

It is a cyclic number.

It is not a de Polignac number, because 1617681061 - 2¹ = 1617681059 is a prime.

Together with 1617681059, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1617681061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1617681001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 808840530 + 808840531.

It is an arithmetic number, because the mean of its divisors is an integer number (808840531).

Almost surely, 2^1617681061 is an apocalyptic number.

It is an amenable number.

1617681061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1617681061 is an equidigital number, since it uses as much as digits as its factorization.

1617681061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 1617681061 is about 40220.4060272892. The cubic root of 1617681061 is about 1173.8996334363.

The spelling of 1617681061 in words is "one billion, six hundred seventeen million, six hundred eighty-one thousand, sixty-one".