84487609 has 4 divisors (see below), whose sum is σ = 85505616. Its totient is φ = 83469604.

The previous prime is 84487607. The next prime is 84487621. The reversal of 84487609 is 90678448.

It is a happy number.

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 84487609 - 2¹ = 84487607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84487607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 508879 + ... + 509044.

It is an arithmetic number, because the mean of its divisors is an integer number (21376404).

Almost surely, 2^84487609 is an apocalyptic number.

It is an amenable number.

84487609 is a deficient number, since it is larger than the sum of its proper divisors (1018007).

84487609 is a wasteful number, since it uses less digits than its factorization.

84487609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018006.

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 84487609 is about 9191.7141491672. The cubic root of 84487609 is about 438.7976973765.

The spelling of 84487609 in words is "eighty-four million, four hundred eighty-seven thousand, six hundred nine".