84272909 has 8 divisors (see below), whose sum is σ = 96413568. Its totient is φ = 72157680.

The previous prime is 84272891. The next prime is 84272941. The reversal of 84272909 is 90927248.

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

It is a de Polignac number, because none of the positive numbers 2^k-84272909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84272959) by changing a digit.

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, 1379 + ... + 13055.

It is an arithmetic number, because the mean of its divisors is an integer number (12051696).

Almost surely, 2^84272909 is an apocalyptic number.

It is an amenable number.

84272909 is a deficient number, since it is larger than the sum of its proper divisors (12140659).

84272909 is a wasteful number, since it uses less digits than its factorization.

84272909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12715.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 84272909 is about 9180.0277232697. The cubic root of 84272909 is about 438.4256910288.

The spelling of 84272909 in words is "eighty-four million, two hundred seventy-two thousand, nine hundred nine".