139566041 has 2 divisors, whose sum is σ = 139566042. Its totient is φ = 139566040.

The previous prime is 139565953. The next prime is 139566043. The reversal of 139566041 is 140665931.

139566041 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139240000 + 326041 = 11800^2 + 571^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139566041 is a prime.

It is a Sophie Germain prime.

Together with 139566043, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 139565992 and 139566010.

It is not a weakly prime, because it can be changed into another prime (139566043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69783020 + 69783021.

It is an arithmetic number, because the mean of its divisors is an integer number (69783021).

Almost surely, 2^139566041 is an apocalyptic number.

It is an amenable number.

139566041 is a deficient number, since it is larger than the sum of its proper divisors (1).

139566041 is an equidigital number, since it uses as much as digits as its factorization.

139566041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 139566041 is about 11813.8072186743. The cubic root of 139566041 is about 518.7123478551.

The spelling of 139566041 in words is "one hundred thirty-nine million, five hundred sixty-six thousand, forty-one".