84908709 has 32 divisors (see below), whose sum is σ = 133128960. Its totient is φ = 53374464.

The previous prime is 84908699. The next prime is 84908717. The reversal of 84908709 is 90780948.

It is not a de Polignac number, because 84908709 - 2²⁴ = 68131493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84908749) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44397 + ... + 46269.

It is an arithmetic number, because the mean of its divisors is an integer number (4160280).

Almost surely, 2^84908709 is an apocalyptic number.

It is an amenable number.

84908709 is a deficient number, since it is larger than the sum of its proper divisors (48220251).

84908709 is a wasteful number, since it uses less digits than its factorization.

84908709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1978 (or 1972 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 84908709 is about 9214.5921776278. The cubic root of 84908709 is about 439.5255026029.

The spelling of 84908709 in words is "eighty-four million, nine hundred eight thousand, seven hundred nine".