39621223 has 2 divisors, whose sum is σ = 39621224. Its totient is φ = 39621222.

The previous prime is 39621209. The next prime is 39621227. The reversal of 39621223 is 32212693.

39621223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (32212693) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39621223 is a prime.

It is a super-3 number, since 3×39621223³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 39621191 and 39621200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39621227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19810611 + 19810612.

It is an arithmetic number, because the mean of its divisors is an integer number (19810612).

Almost surely, 2^39621223 is an apocalyptic number.

39621223 is a deficient number, since it is larger than the sum of its proper divisors (1).

39621223 is an equidigital number, since it uses as much as digits as its factorization.

39621223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 28.

The square root of 39621223 is about 6294.5391411921. The cubic root of 39621223 is about 340.9122646180.

The spelling of 39621223 in words is "thirty-nine million, six hundred twenty-one thousand, two hundred twenty-three".