139395941 has 4 divisors (see below), whose sum is σ = 142795884. Its totient is φ = 135996000.

The previous prime is 139395931. The next prime is 139395967. The reversal of 139395941 is 149593931.

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 12180100 + 127215841 = 3490^2 + 11279^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139395941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139395892 and 139395901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139395901) 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, 1699910 + ... + 1699991.

It is an arithmetic number, because the mean of its divisors is an integer number (35698971).

Almost surely, 2^139395941 is an apocalyptic number.

It is an amenable number.

139395941 is a deficient number, since it is larger than the sum of its proper divisors (3399943).

139395941 is an equidigital number, since it uses as much as digits as its factorization.

139395941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3399942.

The product of its digits is 131220, while the sum is 44.

The square root of 139395941 is about 11806.6058204719. The cubic root of 139395941 is about 518.5015304779.

The spelling of 139395941 in words is "one hundred thirty-nine million, three hundred ninety-five thousand, nine hundred forty-one".