84309289 has 8 divisors (see below), whose sum is σ = 90252000. Its totient is φ = 78517152.

The previous prime is 84309287. The next prime is 84309319. The reversal of 84309289 is 98290348.

It is a happy number.

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 84309289 - 2¹ = 84309287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84309287) 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, 36484 + ... + 38725.

It is an arithmetic number, because the mean of its divisors is an integer number (11281500).

Almost surely, 2^84309289 is an apocalyptic number.

It is an amenable number.

84309289 is a deficient number, since it is larger than the sum of its proper divisors (5942711).

84309289 is a wasteful number, since it uses less digits than its factorization.

84309289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75287.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 84309289 is about 9182.0089849662. The cubic root of 84309289 is about 438.4887703434.

The spelling of 84309289 in words is "eighty-four million, three hundred nine thousand, two hundred eighty-nine".