139759685 has 8 divisors (see below), whose sum is σ = 180612600. Its totient is φ = 103207104.

The previous prime is 139759681. The next prime is 139759727. The reversal of 139759685 is 586957931.

It is a Cunningham number, because it is equal to 11822²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 20666116 + 119093569 = 4546^2 + 10913^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 139759685 - 2² = 139759681 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139759681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1075010 + ... + 1075139.

It is an arithmetic number, because the mean of its divisors is an integer number (22576575).

Almost surely, 2^139759685 is an apocalyptic number.

It is an amenable number.

139759685 is a deficient number, since it is larger than the sum of its proper divisors (40852915).

139759685 is a wasteful number, since it uses less digits than its factorization.

139759685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2150167.

The product of its digits is 2041200, while the sum is 53.

The square root of 139759685 is about 11822.0000422940. Note that the first 4 decimals coincide. The cubic root of 139759685 is about 518.9521366409.

The spelling of 139759685 in words is "one hundred thirty-nine million, seven hundred fifty-nine thousand, six hundred eighty-five".