36217661 has 2 divisors, whose sum is σ = 36217662. Its totient is φ = 36217660.

The previous prime is 36217639. The next prime is 36217673. The reversal of 36217661 is 16671263.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35880100 + 337561 = 5990^2 + 581^2 .

It is a cyclic number.

It is not a de Polignac number, because 36217661 - 2¹⁰ = 36216637 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36217261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18108830 + 18108831.

It is an arithmetic number, because the mean of its divisors is an integer number (18108831).

Almost surely, 2^36217661 is an apocalyptic number.

It is an amenable number.

36217661 is a deficient number, since it is larger than the sum of its proper divisors (1).

36217661 is an equidigital number, since it uses as much as digits as its factorization.

36217661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 32.

The square root of 36217661 is about 6018.1110823912. Note that the first 3 decimals coincide. The cubic root of 36217661 is about 330.8568519059.

The spelling of 36217661 in words is "thirty-six million, two hundred seventeen thousand, six hundred sixty-one".