363639421 has 2 divisors, whose sum is σ = 363639422. Its totient is φ = 363639420.

The previous prime is 363639403. The next prime is 363639427. The reversal of 363639421 is 124936363.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 352913796 + 10725625 = 18786^2 + 3275^2 .

It is a cyclic number.

It is not a de Polignac number, because 363639421 - 2⁵ = 363639389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (363639427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 181819710 + 181819711.

It is an arithmetic number, because the mean of its divisors is an integer number (181819711).

Almost surely, 2^363639421 is an apocalyptic number.

It is an amenable number.

363639421 is a deficient number, since it is larger than the sum of its proper divisors (1).

363639421 is an equidigital number, since it uses as much as digits as its factorization.

363639421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 37.

The square root of 363639421 is about 19069.3319494942. The cubic root of 363639421 is about 713.7678558863.

The spelling of 363639421 in words is "three hundred sixty-three million, six hundred thirty-nine thousand, four hundred twenty-one".