36455821 has 2 divisors, whose sum is σ = 36455822. Its totient is φ = 36455820.

The previous prime is 36455819. The next prime is 36455831. The reversal of 36455821 is 12855463.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36421225 + 34596 = 6035^2 + 186^2 .

It is an emirp because it is prime and its reverse (12855463) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36455821 - 2¹ = 36455819 is a prime.

Together with 36455819, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36455831) 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, 18227910 + 18227911.

It is an arithmetic number, because the mean of its divisors is an integer number (18227911).

Almost surely, 2^36455821 is an apocalyptic number.

It is an amenable number.

36455821 is a deficient number, since it is larger than the sum of its proper divisors (1).

36455821 is an equidigital number, since it uses as much as digits as its factorization.

36455821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28800, while the sum is 34.

The square root of 36455821 is about 6037.8655996966. The cubic root of 36455821 is about 331.5804839360.

The spelling of 36455821 in words is "thirty-six million, four hundred fifty-five thousand, eight hundred twenty-one".