139490773 has 2 divisors, whose sum is σ = 139490774. Its totient is φ = 139490772.

The previous prime is 139490749. The next prime is 139490779. The reversal of 139490773 is 377094931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117896164 + 21594609 = 10858^2 + 4647^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139490773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139490779) 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, 69745386 + 69745387.

It is an arithmetic number, because the mean of its divisors is an integer number (69745387).

Almost surely, 2^139490773 is an apocalyptic number.

It is an amenable number.

139490773 is a deficient number, since it is larger than the sum of its proper divisors (1).

139490773 is an equidigital number, since it uses as much as digits as its factorization.

139490773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 142884, while the sum is 43.

The square root of 139490773 is about 11810.6211945012. The cubic root of 139490773 is about 518.6190838553.

The spelling of 139490773 in words is "one hundred thirty-nine million, four hundred ninety thousand, seven hundred seventy-three".