139757 has 4 divisors (see below), whose sum is σ = 147996. Its totient is φ = 131520.

The previous prime is 139753. The next prime is 139759. The reversal of 139757 is 757931.

139757 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 757931 = 463 ⋅1637.

It can be written as a sum of positive squares in 2 ways, for example, as 121801 + 17956 = 349^2 + 134^2 .

It is a cyclic number.

It is not a de Polignac number, because 139757 - 2² = 139753 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 139757.

It is not an unprimeable number, because it can be changed into a prime (139753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4094 + ... + 4127.

It is an arithmetic number, because the mean of its divisors is an integer number (36999).

2¹³⁹⁷⁵⁷ is an apocalyptic number.

139757 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

139757 is a deficient number, since it is larger than the sum of its proper divisors (8239).

139757 is an equidigital number, since it uses as much as digits as its factorization.

139757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8238.

The product of its digits is 6615, while the sum is 32.

The square root of 139757 is about 373.8408752397. The cubic root of 139757 is about 51.8948813328.

The spelling of 139757 in words is "one hundred thirty-nine thousand, seven hundred fifty-seven".