84909147 has 16 divisors (see below), whose sum is σ = 115848480. Its totient is φ = 55302912.

The previous prime is 84909137. The next prime is 84909151. The reversal of 84909147 is 74190948.

It is not a de Polignac number, because 84909147 - 2¹⁰ = 84908123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84909099 and 84909108.

It is not an unprimeable number, because it can be changed into a prime (84909137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22093 + ... + 25649.

It is an arithmetic number, because the mean of its divisors is an integer number (7240530).

Almost surely, 2^84909147 is an apocalyptic number.

84909147 is a deficient number, since it is larger than the sum of its proper divisors (30939333).

84909147 is a wasteful number, since it uses less digits than its factorization.

84909147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3742.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 84909147 is about 9214.6159442486. The cubic root of 84909147 is about 439.5262583630.

The spelling of 84909147 in words is "eighty-four million, nine hundred nine thousand, one hundred forty-seven".