138614505 has 8 divisors (see below), whose sum is σ = 221783232. Its totient is φ = 73927728.

The previous prime is 138614471. The next prime is 138614513. The reversal of 138614505 is 505416831.

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

It is not a de Polignac number, because 138614505 - 2¹⁹ = 138090217 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4620469 + ... + 4620498.

It is an arithmetic number, because the mean of its divisors is an integer number (27722904).

Almost surely, 2^138614505 is an apocalyptic number.

138614505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138614505 is a deficient number, since it is larger than the sum of its proper divisors (83168727).

138614505 is an equidigital number, since it uses as much as digits as its factorization.

138614505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9240975.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 138614505 is about 11773.4661421350. The cubic root of 138614505 is about 517.5308296880.

The spelling of 138614505 in words is "one hundred thirty-eight million, six hundred fourteen thousand, five hundred five".