39961223 has 2 divisors, whose sum is σ = 39961224. Its totient is φ = 39961222.

The previous prime is 39961193. The next prime is 39961261. The reversal of 39961223 is 32216993.

It is a weak prime.

It is an emirp because it is prime and its reverse (32216993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39961223 - 2⁸ = 39960967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39961423) 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, 19980611 + 19980612.

It is an arithmetic number, because the mean of its divisors is an integer number (19980612).

Almost surely, 2^39961223 is an apocalyptic number.

39961223 is a deficient number, since it is larger than the sum of its proper divisors (1).

39961223 is an equidigital number, since it uses as much as digits as its factorization.

39961223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 35.

The square root of 39961223 is about 6321.4889859906. The cubic root of 39961223 is about 341.8846407093.

The spelling of 39961223 in words is "thirty-nine million, nine hundred sixty-one thousand, two hundred twenty-three".