139305261645247 has 2 divisors, whose sum is σ = 139305261645248. Its totient is φ = 139305261645246.

The previous prime is 139305261645203. The next prime is 139305261645281. The reversal of 139305261645247 is 742546162503931.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139305261645247 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139305261645191 and 139305261645200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139305261645287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69652630822623 + 69652630822624.

It is an arithmetic number, because the mean of its divisors is an integer number (69652630822624).

Almost surely, 2^{139305261645247} is an apocalyptic number.

139305261645247 is a deficient number, since it is larger than the sum of its proper divisors (1).

139305261645247 is an equidigital number, since it uses as much as digits as its factorization.

139305261645247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32659200, while the sum is 58.

The spelling of 139305261645247 in words is "one hundred thirty-nine trillion, three hundred five billion, two hundred sixty-one million, six hundred forty-five thousand, two hundred forty-seven".