139697141 has 4 divisors (see below), whose sum is σ = 139723500. Its totient is φ = 139670784.

The previous prime is 139697111. The next prime is 139697171. The reversal of 139697141 is 141796931.

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

It is an interprime number because it is at equal distance from previous prime (139697111) and next prime (139697171).

It can be written as a sum of positive squares in 2 ways, for example, as 107536900 + 32160241 = 10370^2 + 5671^2 .

It is a cyclic number.

It is not a de Polignac number, because 139697141 - 2²² = 135502837 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 (139697111) 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, 2156 + ... + 16853.

It is an arithmetic number, because the mean of its divisors is an integer number (34930875).

Almost surely, 2^139697141 is an apocalyptic number.

It is an amenable number.

139697141 is a deficient number, since it is larger than the sum of its proper divisors (26359).

139697141 is an equidigital number, since it uses as much as digits as its factorization.

139697141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26358.

The product of its digits is 40824, while the sum is 41.

The square root of 139697141 is about 11819.3545086016. The cubic root of 139697141 is about 518.8747128227.

The spelling of 139697141 in words is "one hundred thirty-nine million, six hundred ninety-seven thousand, one hundred forty-one".