36881321 has 2 divisors, whose sum is σ = 36881322. Its totient is φ = 36881320.

The previous prime is 36881291. The next prime is 36881353. The reversal of 36881321 is 12318863.

It is a happy number.

It is an a-pointer prime, because the next prime (36881353) can be obtained adding 36881321 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29041321 + 7840000 = 5389^2 + 2800^2 .

It is a cyclic number.

It is not a de Polignac number, because 36881321 - 2¹⁴ = 36864937 is a prime.

It is not a weakly prime, because it can be changed into another prime (36880321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18440660 + 18440661.

It is an arithmetic number, because the mean of its divisors is an integer number (18440661).

Almost surely, 2^36881321 is an apocalyptic number.

It is an amenable number.

36881321 is a deficient number, since it is larger than the sum of its proper divisors (1).

36881321 is an equidigital number, since it uses as much as digits as its factorization.

36881321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 32.

The square root of 36881321 is about 6072.9993413469. Note that the first 3 decimals coincide. The cubic root of 36881321 is about 332.8655290067.

The spelling of 36881321 in words is "thirty-six million, eight hundred eighty-one thousand, three hundred twenty-one".