138747155 has 8 divisors (see below), whose sum is σ = 173735712. Its totient is φ = 106171648.

The previous prime is 138747131. The next prime is 138747181. The reversal of 138747155 is 551747831.

It is a happy number.

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 138747155 - 2⁸ = 138746899 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 603134 + ... + 603363.

It is an arithmetic number, because the mean of its divisors is an integer number (21716964).

Almost surely, 2^138747155 is an apocalyptic number.

138747155 is a deficient number, since it is larger than the sum of its proper divisors (34988557).

138747155 is a wasteful number, since it uses less digits than its factorization.

138747155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1206525.

The product of its digits is 117600, while the sum is 41.

The square root of 138747155 is about 11779.0982252463. The cubic root of 138747155 is about 517.6958643101.

The spelling of 138747155 in words is "one hundred thirty-eight million, seven hundred forty-seven thousand, one hundred fifty-five".