138878097 has 8 divisors (see below), whose sum is σ = 186503520. Its totient is φ = 91919040.

The previous prime is 138878063. The next prime is 138878137. The reversal of 138878097 is 790878831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138878097 - 2¹⁰ = 138877073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138878297) 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 7 ways as a sum of consecutive naturals, for example, 166104 + ... + 166937.

It is an arithmetic number, because the mean of its divisors is an integer number (23312940).

Almost surely, 2^138878097 is an apocalyptic number.

It is an amenable number.

138878097 is a deficient number, since it is larger than the sum of its proper divisors (47625423).

138878097 is a wasteful number, since it uses less digits than its factorization.

138878097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333183.

The product of its (nonzero) digits is 677376, while the sum is 51.

The square root of 138878097 is about 11784.6551498124. The cubic root of 138878097 is about 517.8586708150.

The spelling of 138878097 in words is "one hundred thirty-eight million, eight hundred seventy-eight thousand, ninety-seven".