84512409 has 16 divisors (see below), whose sum is σ = 117184320. Its totient is φ = 54111680.

The previous prime is 84512377. The next prime is 84512411. The reversal of 84512409 is 90421548.

It is not a de Polignac number, because 84512409 - 2⁵ = 84512377 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84512409.

It is not an unprimeable number, because it can be changed into a prime (84512429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14674 + ... + 19604.

It is an arithmetic number, because the mean of its divisors is an integer number (7324020).

Almost surely, 2^84512409 is an apocalyptic number.

It is an amenable number.

84512409 is a deficient number, since it is larger than the sum of its proper divisors (32671911).

84512409 is a wasteful number, since it uses less digits than its factorization.

84512409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5160.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 84512409 is about 9193.0630912662. The cubic root of 84512409 is about 438.8406272153.

The spelling of 84512409 in words is "eighty-four million, five hundred twelve thousand, four hundred nine".