139080881 has 2 divisors, whose sum is σ = 139080882. Its totient is φ = 139080880.

The previous prime is 139080833. The next prime is 139080959. The reversal of 139080881 is 188080931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138768400 + 312481 = 11780^2 + 559^2 .

It is an emirp because it is prime and its reverse (188080931) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139080881 is a prime.

It is a super-2 number, since 2×139080881² = 38686982919472322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (139088881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69540440 + 69540441.

It is an arithmetic number, because the mean of its divisors is an integer number (69540441).

Almost surely, 2^139080881 is an apocalyptic number.

It is an amenable number.

139080881 is a deficient number, since it is larger than the sum of its proper divisors (1).

139080881 is an equidigital number, since it uses as much as digits as its factorization.

139080881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 38.

The square root of 139080881 is about 11793.2557421604. The cubic root of 139080881 is about 518.1106001072.

Subtracting 139080881 from its reverse (188080931), we obtain a triangular number (49000050 = T₉₈₉₉).

The spelling of 139080881 in words is "one hundred thirty-nine million, eighty thousand, eight hundred eighty-one".