139991141 has 4 divisors (see below), whose sum is σ = 148225932. Its totient is φ = 131756352.

The previous prime is 139991123. The next prime is 139991147. The reversal of 139991141 is 141199931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 49646116 + 90345025 = 7046^2 + 9505^2 .

It is a cyclic number.

It is not a de Polignac number, because 139991141 - 2⁶ = 139991077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139991095 and 139991104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139991147) 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, 4117370 + ... + 4117403.

It is an arithmetic number, because the mean of its divisors is an integer number (37056483).

Almost surely, 2^139991141 is an apocalyptic number.

It is an amenable number.

139991141 is a deficient number, since it is larger than the sum of its proper divisors (8234791).

139991141 is an equidigital number, since it uses as much as digits as its factorization.

139991141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8234790.

The product of its digits is 8748, while the sum is 38.

The square root of 139991141 is about 11831.7851991997. The cubic root of 139991141 is about 519.2384575005.

The spelling of 139991141 in words is "one hundred thirty-nine million, nine hundred ninety-one thousand, one hundred forty-one".