84959309 has 4 divisors (see below), whose sum is σ = 88653216. Its totient is φ = 81265404.

The previous prime is 84959267. The next prime is 84959323. The reversal of 84959309 is 90395948.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 84959309 - 2¹⁶ = 84893773 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 (84958309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1846919 + ... + 1846964.

It is an arithmetic number, because the mean of its divisors is an integer number (22163304).

Almost surely, 2^84959309 is an apocalyptic number.

It is an amenable number.

84959309 is a deficient number, since it is larger than the sum of its proper divisors (3693907).

84959309 is a wasteful number, since it uses less digits than its factorization.

84959309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3693906.

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 84959309 is about 9217.3374138088. The cubic root of 84959309 is about 439.6127946852.

The spelling of 84959309 in words is "eighty-four million, nine hundred fifty-nine thousand, three hundred nine".