139779055 has 24 divisors (see below), whose sum is σ = 183910608. Its totient is φ = 101926656.

The previous prime is 139779053. The next prime is 139779061. The reversal of 139779055 is 550977931.

It is a happy number.

It is not a de Polignac number, because 139779055 - 2¹ = 139779053 is a prime.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139778996 and 139779014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139779053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69139 + ... + 71131.

It is an arithmetic number, because the mean of its divisors is an integer number (7662942).

Almost surely, 2^139779055 is an apocalyptic number.

139779055 is a deficient number, since it is larger than the sum of its proper divisors (44131553).

139779055 is a wasteful number, since it uses less digits than its factorization.

139779055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2107 (or 2094 counting only the distinct ones).

The product of its (nonzero) digits is 297675, while the sum is 46.

The square root of 139779055 is about 11822.8192492315. The cubic root of 139779055 is about 518.9761102652.

It can be divided in two parts, 13977 and 9055, that added together give a palindrome (23032).

The spelling of 139779055 in words is "one hundred thirty-nine million, seven hundred seventy-nine thousand, fifty-five".