138695115 has 32 divisors (see below), whose sum is σ = 239855616. Its totient is φ = 68031360.

The previous prime is 138695113. The next prime is 138695131. The reversal of 138695115 is 511596831.

It is not a de Polignac number, because 138695115 - 2¹ = 138695113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (138695113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59502 + ... + 61788.

It is an arithmetic number, because the mean of its divisors is an integer number (7495488).

Almost surely, 2^138695115 is an apocalyptic number.

138695115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138695115 is a deficient number, since it is larger than the sum of its proper divisors (101160501).

138695115 is a wasteful number, since it uses less digits than its factorization.

138695115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2619.

The product of its digits is 32400, while the sum is 39.

The square root of 138695115 is about 11776.8890204502. The cubic root of 138695115 is about 517.6311320237.

The spelling of 138695115 in words is "one hundred thirty-eight million, six hundred ninety-five thousand, one hundred fifteen".