138911013 has 24 divisors (see below), whose sum is σ = 204106968. Its totient is φ = 91026432.

The previous prime is 138910999. The next prime is 138911021. The reversal of 138911013 is 310119831.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13089924 + 125821089 = 3618^2 + 11217^2 .

It is not a de Polignac number, because 138911013 - 2⁴ = 138910997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138911083) 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 in 23 ways as a sum of consecutive naturals, for example, 138831 + ... + 139827.

It is an arithmetic number, because the mean of its divisors is an integer number (8504457).

Almost surely, 2^138911013 is an apocalyptic number.

It is an amenable number.

138911013 is a deficient number, since it is larger than the sum of its proper divisors (65195955).

138911013 is a wasteful number, since it uses less digits than its factorization.

138911013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253 (or 1250 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 138911013 is about 11786.0516289383. The cubic root of 138911013 is about 517.8995807686.

The spelling of 138911013 in words is "one hundred thirty-eight million, nine hundred eleven thousand, thirteen".