139351 has 4 divisors (see below), whose sum is σ = 140104. Its totient is φ = 138600.

The previous prime is 139343. The next prime is 139361. The reversal of 139351 is 153931.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 153931 = 59 ⋅2609.

It is a cyclic number.

It is not a de Polignac number, because 139351 - 2³ = 139343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121 + ... + 541.

It is an arithmetic number, because the mean of its divisors is an integer number (35026).

2¹³⁹³⁵¹ is an apocalyptic number.

139351 is a deficient number, since it is larger than the sum of its proper divisors (753).

139351 is an equidigital number, since it uses as much as digits as its factorization.

139351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752.

The product of its digits is 405, while the sum is 22.

The square root of 139351 is about 373.2974685154. The cubic root of 139351 is about 51.8445803169.

It can be divided in two parts, 1393 and 51, that added together give a square (1444 = 38²).

The spelling of 139351 in words is "one hundred thirty-nine thousand, three hundred fifty-one".