84881309 has 8 divisors (see below), whose sum is σ = 86014560. Its totient is φ = 83754000.

The previous prime is 84881299. The next prime is 84881333. The reversal of 84881309 is 90318848.

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 84881309 - 2¹² = 84877213 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 (84881399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32162 + ... + 34700.

It is an arithmetic number, because the mean of its divisors is an integer number (10751820).

Almost surely, 2^84881309 is an apocalyptic number.

It is an amenable number.

84881309 is a deficient number, since it is larger than the sum of its proper divisors (1133251).

84881309 is a wasteful number, since it uses less digits than its factorization.

84881309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2971.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 84881309 is about 9213.1052854073. The cubic root of 84881309 is about 439.4782192929.

The spelling of 84881309 in words is "eighty-four million, eight hundred eighty-one thousand, three hundred nine".