139955093 has 2 divisors, whose sum is σ = 139955094. Its totient is φ = 139955092.

The previous prime is 139955071. The next prime is 139955107. The reversal of 139955093 is 390559931.

139955093 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126720049 + 13235044 = 11257^2 + 3638^2 .

It is an emirp because it is prime and its reverse (390559931) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139955093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139955593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69977546 + 69977547.

It is an arithmetic number, because the mean of its divisors is an integer number (69977547).

Almost surely, 2^139955093 is an apocalyptic number.

It is an amenable number.

139955093 is a deficient number, since it is larger than the sum of its proper divisors (1).

139955093 is an equidigital number, since it uses as much as digits as its factorization.

139955093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 164025, while the sum is 44.

The square root of 139955093 is about 11830.2617468930. The cubic root of 139955093 is about 519.1938853592.

The spelling of 139955093 in words is "one hundred thirty-nine million, nine hundred fifty-five thousand, ninety-three".