139808573 has 2 divisors, whose sum is σ = 139808574. Its totient is φ = 139808572.

The previous prime is 139808569. The next prime is 139808611. The reversal of 139808573 is 375808931.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97259044 + 42549529 = 9862^2 + 6523^2 .

It is a cyclic number.

It is not a de Polignac number, because 139808573 - 2² = 139808569 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139802573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69904286 + 69904287.

It is an arithmetic number, because the mean of its divisors is an integer number (69904287).

Almost surely, 2^139808573 is an apocalyptic number.

It is an amenable number.

139808573 is a deficient number, since it is larger than the sum of its proper divisors (1).

139808573 is an equidigital number, since it uses as much as digits as its factorization.

139808573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 139808573 is about 11824.0675319452. The cubic root of 139808573 is about 519.0126394829.

The spelling of 139808573 in words is "one hundred thirty-nine million, eight hundred eight thousand, five hundred seventy-three".