84700509 has 4 divisors (see below), whose sum is σ = 112934016. Its totient is φ = 56467004.

The previous prime is 84700493. The next prime is 84700523. The reversal of 84700509 is 90500748.

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 84700509 - 2⁴ = 84700493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84700509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84700709) 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, 14116749 + ... + 14116754.

It is an arithmetic number, because the mean of its divisors is an integer number (28233504).

Almost surely, 2^84700509 is an apocalyptic number.

It is an amenable number.

84700509 is a deficient number, since it is larger than the sum of its proper divisors (28233507).

84700509 is a wasteful number, since it uses less digits than its factorization.

84700509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28233506.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 84700509 is about 9203.2879450770. The cubic root of 84700509 is about 439.1659630940.

The spelling of 84700509 in words is "eighty-four million, seven hundred thousand, five hundred nine".