36720161 has 2 divisors, whose sum is σ = 36720162. Its totient is φ = 36720160.

The previous prime is 36720157. The next prime is 36720163. The reversal of 36720161 is 16102763.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30747025 + 5973136 = 5545^2 + 2444^2 .

It is an emirp because it is prime and its reverse (16102763) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36720161 - 2² = 36720157 is a prime.

Together with 36720163, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_2245616 and since 36720161 and 2245616 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 36720161.

It is not a weakly prime, because it can be changed into another prime (36720163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18360080 + 18360081.

It is an arithmetic number, because the mean of its divisors is an integer number (18360081).

Almost surely, 2^36720161 is an apocalyptic number.

It is an amenable number.

36720161 is a deficient number, since it is larger than the sum of its proper divisors (1).

36720161 is an equidigital number, since it uses as much as digits as its factorization.

36720161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 36720161 is about 6059.7162474822. The cubic root of 36720161 is about 332.3799811807.

The spelling of 36720161 in words is "thirty-six million, seven hundred twenty thousand, one hundred sixty-one".