84138155 has 8 divisors (see below), whose sum is σ = 101586192. Its totient is φ = 66896928.

The previous prime is 84138101. The next prime is 84138181. The reversal of 84138155 is 55183148.

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 84138155 - 2¹⁶ = 84072619 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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50804 + ... + 52433.

It is an arithmetic number, because the mean of its divisors is an integer number (12698274).

Almost surely, 2^84138155 is an apocalyptic number.

84138155 is a deficient number, since it is larger than the sum of its proper divisors (17448037).

84138155 is a wasteful number, since it uses less digits than its factorization.

84138155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103405.

The product of its digits is 19200, while the sum is 35.

The square root of 84138155 is about 9172.6852665945. The cubic root of 84138155 is about 438.1918826630.

The spelling of 84138155 in words is "eighty-four million, one hundred thirty-eight thousand, one hundred fifty-five".