138792187 has 8 divisors (see below), whose sum is σ = 139631760. Its totient is φ = 137955840.

The previous prime is 138792167. The next prime is 138792209. The reversal of 138792187 is 781297831.

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

It is a cyclic number.

It is not a de Polignac number, because 138792187 - 2¹¹ = 138790139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138792167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200512 + ... + 201202.

It is an arithmetic number, because the mean of its divisors is an integer number (17453970).

Almost surely, 2^138792187 is an apocalyptic number.

138792187 is a deficient number, since it is larger than the sum of its proper divisors (839573).

138792187 is an equidigital number, since it uses as much as digits as its factorization.

138792187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1613.

The product of its digits is 169344, while the sum is 46.

The square root of 138792187 is about 11781.0095917116. The cubic root of 138792187 is about 517.7518663196.

The spelling of 138792187 in words is "one hundred thirty-eight million, seven hundred ninety-two thousand, one hundred eighty-seven".