139914161 has 4 divisors (see below), whose sum is σ = 140805492. Its totient is φ = 139022832.

The previous prime is 139914149. The next prime is 139914169. The reversal of 139914161 is 161419931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 161419931 = 97 ⋅1664123.

It can be written as a sum of positive squares in 2 ways, for example, as 11771761 + 128142400 = 3431^2 + 11320^2 .

It is a cyclic number.

It is not a de Polignac number, because 139914161 - 2¹⁸ = 139652017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (139914169) 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, 445430 + ... + 445743.

It is an arithmetic number, because the mean of its divisors is an integer number (35201373).

Almost surely, 2^139914161 is an apocalyptic number.

It is an amenable number.

139914161 is a deficient number, since it is larger than the sum of its proper divisors (891331).

139914161 is an equidigital number, since it uses as much as digits as its factorization.

139914161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891330.

The product of its digits is 5832, while the sum is 35.

The square root of 139914161 is about 11828.5316502092. The cubic root of 139914161 is about 519.1432650357.

The spelling of 139914161 in words is "one hundred thirty-nine million, nine hundred fourteen thousand, one hundred sixty-one".