36440381 has 2 divisors, whose sum is σ = 36440382. Its totient is φ = 36440380.

The previous prime is 36440357. The next prime is 36440387. The reversal of 36440381 is 18304463.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35295481 + 1144900 = 5941^2 + 1070^2 .

It is a cyclic number.

It is not a de Polignac number, because 36440381 - 2²² = 32246077 is a prime.

It is a super-2 number, since 2×36440381² = 2655802734850322, which contains 22 as substring.

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 (36440387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18220190 + 18220191.

It is an arithmetic number, because the mean of its divisors is an integer number (18220191).

Almost surely, 2^36440381 is an apocalyptic number.

It is an amenable number.

36440381 is a deficient number, since it is larger than the sum of its proper divisors (1).

36440381 is an equidigital number, since it uses as much as digits as its factorization.

36440381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 36440381 is about 6036.5868667650. The cubic root of 36440381 is about 331.5336663043.

The spelling of 36440381 in words is "thirty-six million, four hundred forty thousand, three hundred eighty-one".