139819817461 has 2 divisors, whose sum is σ = 139819817462. Its totient is φ = 139819817460.

The previous prime is 139819817447. The next prime is 139819817479. The reversal of 139819817461 is 164718918931.

It is a happy number.

139819817461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94464022500 + 45355794961 = 307350^2 + 212969^2 .

It is a cyclic number.

It is not a de Polignac number, because 139819817461 - 2⁵ = 139819817429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139819817396 and 139819817405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139819817861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69909908730 + 69909908731.

It is an arithmetic number, because the mean of its divisors is an integer number (69909908731).

Almost surely, 2^139819817461 is an apocalyptic number.

It is an amenable number.

139819817461 is a deficient number, since it is larger than the sum of its proper divisors (1).

139819817461 is an equidigital number, since it uses as much as digits as its factorization.

139819817461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2612736, while the sum is 58.

The spelling of 139819817461 in words is "one hundred thirty-nine billion, eight hundred nineteen million, eight hundred seventeen thousand, four hundred sixty-one".