139454717 has 2 divisors, whose sum is σ = 139454718. Its totient is φ = 139454716.

The previous prime is 139454683. The next prime is 139454729. The reversal of 139454717 is 717454931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93296281 + 46158436 = 9659^2 + 6794^2 .

It is an emirp because it is prime and its reverse (717454931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139454717 - 2¹⁰ = 139453693 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139454617) 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, 69727358 + 69727359.

It is an arithmetic number, because the mean of its divisors is an integer number (69727359).

Almost surely, 2^139454717 is an apocalyptic number.

It is an amenable number.

139454717 is a deficient number, since it is larger than the sum of its proper divisors (1).

139454717 is an equidigital number, since it uses as much as digits as its factorization.

139454717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 41.

The square root of 139454717 is about 11809.0946731746. The cubic root of 139454717 is about 518.5743952577.

The spelling of 139454717 in words is "one hundred thirty-nine million, four hundred fifty-four thousand, seven hundred seventeen".