161736077 has 2 divisors, whose sum is σ = 161736078. Its totient is φ = 161736076.

The previous prime is 161736067. The next prime is 161736101. The reversal of 161736077 is 770637161.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99420841 + 62315236 = 9971^2 + 7894^2 .

It is a cyclic number.

It is not a de Polignac number, because 161736077 - 2¹⁰ = 161735053 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161736077.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161736067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80868038 + 80868039.

It is an arithmetic number, because the mean of its divisors is an integer number (80868039).

Almost surely, 2^161736077 is an apocalyptic number.

It is an amenable number.

161736077 is a deficient number, since it is larger than the sum of its proper divisors (1).

161736077 is an equidigital number, since it uses as much as digits as its factorization.

161736077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37044, while the sum is 38.

The square root of 161736077 is about 12717.5499605860. The cubic root of 161736077 is about 544.8399799541.

The spelling of 161736077 in words is "one hundred sixty-one million, seven hundred thirty-six thousand, seventy-seven".