161105677 has 2 divisors, whose sum is σ = 161105678. Its totient is φ = 161105676.

The previous prime is 161105663. The next prime is 161105689. The reversal of 161105677 is 776501161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114511401 + 46594276 = 10701^2 + 6826^2 .

It is a cyclic number.

It is not a de Polignac number, because 161105677 - 2¹¹ = 161103629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161105627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80552838 + 80552839.

It is an arithmetic number, because the mean of its divisors is an integer number (80552839).

Almost surely, 2^161105677 is an apocalyptic number.

It is an amenable number.

161105677 is a deficient number, since it is larger than the sum of its proper divisors (1).

161105677 is an equidigital number, since it uses as much as digits as its factorization.

161105677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8820, while the sum is 34.

The square root of 161105677 is about 12692.7411145111. The cubic root of 161105677 is about 544.1311825450.

The spelling of 161105677 in words is "one hundred sixty-one million, one hundred five thousand, six hundred seventy-seven".