84700809 has 12 divisors (see below), whose sum is σ = 126877296. Its totient is φ = 56467044.

The previous prime is 84700787. The next prime is 84700823. The reversal of 84700809 is 90800748.

It is a de Polignac number, because none of the positive numbers 2^k-84700809 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (84700849) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 174039 + ... + 174524.

It is an arithmetic number, because the mean of its divisors is an integer number (10573108).

Almost surely, 2^84700809 is an apocalyptic number.

It is an amenable number.

84700809 is a deficient number, since it is larger than the sum of its proper divisors (42176487).

84700809 is an equidigital number, since it uses as much as digits as its factorization.

84700809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348578 (or 348566 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 84700809 is about 9203.3042435856. The cubic root of 84700809 is about 439.1664815861.

The spelling of 84700809 in words is "eighty-four million, seven hundred thousand, eight hundred nine".