139947163 has 2 divisors, whose sum is σ = 139947164. Its totient is φ = 139947162.

The previous prime is 139947161. The next prime is 139947173. The reversal of 139947163 is 361749931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139947163 - 2¹ = 139947161 is a prime.

Together with 139947161, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (139947161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69973581 + 69973582.

It is an arithmetic number, because the mean of its divisors is an integer number (69973582).

Almost surely, 2^139947163 is an apocalyptic number.

139947163 is a deficient number, since it is larger than the sum of its proper divisors (1).

139947163 is an equidigital number, since it uses as much as digits as its factorization.

139947163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 43.

The square root of 139947163 is about 11829.9265847257. The cubic root of 139947163 is about 519.1840791535.

The spelling of 139947163 in words is "one hundred thirty-nine million, nine hundred forty-seven thousand, one hundred sixty-three".