138951158 has 4 divisors (see below), whose sum is σ = 208426740. Its totient is φ = 69475578.

The previous prime is 138951157. The next prime is 138951179. The reversal of 138951158 is 851159831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 851159831 = 29 ⋅29350339.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138951157) 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, 34737788 + ... + 34737791.

It is an arithmetic number, because the mean of its divisors is an integer number (52106685).

Almost surely, 2^138951158 is an apocalyptic number.

138951158 is a deficient number, since it is larger than the sum of its proper divisors (69475582).

138951158 is an equidigital number, since it uses as much as digits as its factorization.

138951158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69475581.

The product of its digits is 43200, while the sum is 41.

The square root of 138951158 is about 11787.7545783750. The cubic root of 138951158 is about 517.9494666048.

The spelling of 138951158 in words is "one hundred thirty-eight million, nine hundred fifty-one thousand, one hundred fifty-eight".