139540307839 has 2 divisors, whose sum is σ = 139540307840. Its totient is φ = 139540307838.

The previous prime is 139540307801. The next prime is 139540307867. The reversal of 139540307839 is 938703045931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139540307839 - 2¹⁵ = 139540275071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139540307939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69770153919 + 69770153920.

It is an arithmetic number, because the mean of its divisors is an integer number (69770153920).

Almost surely, 2^139540307839 is an apocalyptic number.

139540307839 is a deficient number, since it is larger than the sum of its proper divisors (1).

139540307839 is an equidigital number, since it uses as much as digits as its factorization.

139540307839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2449440, while the sum is 52.

The spelling of 139540307839 in words is "one hundred thirty-nine billion, five hundred forty million, three hundred seven thousand, eight hundred thirty-nine".