139245261091 has 2 divisors, whose sum is σ = 139245261092. Its totient is φ = 139245261090.

The previous prime is 139245261073. The next prime is 139245261119. The reversal of 139245261091 is 190162542931.

It is a weak prime.

It is an emirp because it is prime and its reverse (190162542931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139245261091 - 2¹⁵ = 139245228323 is a prime.

It is not a weakly prime, because it can be changed into another prime (139245261691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69622630545 + 69622630546.

It is an arithmetic number, because the mean of its divisors is an integer number (69622630546).

Almost surely, 2^139245261091 is an apocalyptic number.

139245261091 is a deficient number, since it is larger than the sum of its proper divisors (1).

139245261091 is an equidigital number, since it uses as much as digits as its factorization.

139245261091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 43.

The spelling of 139245261091 in words is "one hundred thirty-nine billion, two hundred forty-five million, two hundred sixty-one thousand, ninety-one".