364637821 has 2 divisors, whose sum is σ = 364637822. Its totient is φ = 364637820.

The previous prime is 364637789. The next prime is 364637869. The reversal of 364637821 is 128736463.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 277588921 + 87048900 = 16661^2 + 9330^2 .

It is a cyclic number.

It is not a de Polignac number, because 364637821 - 2⁵ = 364637789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (364637521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 182318910 + 182318911.

It is an arithmetic number, because the mean of its divisors is an integer number (182318911).

Almost surely, 2^364637821 is an apocalyptic number.

It is an amenable number.

364637821 is a deficient number, since it is larger than the sum of its proper divisors (1).

364637821 is an equidigital number, since it uses as much as digits as its factorization.

364637821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 40.

The square root of 364637821 is about 19095.4921643827. The cubic root of 364637821 is about 714.4204938105.

The spelling of 364637821 in words is "three hundred sixty-four million, six hundred thirty-seven thousand, eight hundred twenty-one".