84809207 has 4 divisors (see below), whose sum is σ = 96924816. Its totient is φ = 72693600.

The previous prime is 84809171. The next prime is 84809227. The reversal of 84809207 is 70290848.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 84809207 - 2¹⁰ = 84808183 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 (84809227) 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, 6057794 + ... + 6057807.

It is an arithmetic number, because the mean of its divisors is an integer number (24231204).

Almost surely, 2^84809207 is an apocalyptic number.

84809207 is a deficient number, since it is larger than the sum of its proper divisors (12115609).

84809207 is a wasteful number, since it uses less digits than its factorization.

84809207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12115608.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 84809207 is about 9209.1914411636. The cubic root of 84809207 is about 439.3537465227.

The spelling of 84809207 in words is "eighty-four million, eight hundred nine thousand, two hundred seven".