139054693 has 2 divisors, whose sum is σ = 139054694. Its totient is φ = 139054692.

The previous prime is 139054691. The next prime is 139054703. The reversal of 139054693 is 396450931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81036004 + 58018689 = 9002^2 + 7617^2 .

It is a cyclic number.

It is not a de Polignac number, because 139054693 - 2¹ = 139054691 is a prime.

Together with 139054691, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139054691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69527346 + 69527347.

It is an arithmetic number, because the mean of its divisors is an integer number (69527347).

Almost surely, 2^139054693 is an apocalyptic number.

It is an amenable number.

139054693 is a deficient number, since it is larger than the sum of its proper divisors (1).

139054693 is an equidigital number, since it uses as much as digits as its factorization.

139054693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 40.

The square root of 139054693 is about 11792.1453942868. The cubic root of 139054693 is about 518.0780791454.

The spelling of 139054693 in words is "one hundred thirty-nine million, fifty-four thousand, six hundred ninety-three".