84709665 has 16 divisors (see below), whose sum is σ = 150595200. Its totient is φ = 45178416.

The previous prime is 84709661. The next prime is 84709697. The reversal of 84709665 is 56690748.

It is not a de Polignac number, because 84709665 - 2² = 84709661 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 84709665.

It is not an unprimeable number, because it can be changed into a prime (84709661) 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, 313605 + ... + 313874.

It is an arithmetic number, because the mean of its divisors is an integer number (9412200).

Almost surely, 2^84709665 is an apocalyptic number.

It is an amenable number.

84709665 is a deficient number, since it is larger than the sum of its proper divisors (65885535).

84709665 is a wasteful number, since it uses less digits than its factorization.

84709665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627493 (or 627487 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 84709665 is about 9203.7853625560. The cubic root of 84709665 is about 439.1817869213.

The spelling of 84709665 in words is "eighty-four million, seven hundred nine thousand, six hundred sixty-five".