84057689 has 4 divisors (see below), whose sum is σ = 86956260. Its totient is φ = 81159120.

The previous prime is 84057683. The next prime is 84057719. The reversal of 84057689 is 98675048.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 54169600 + 29888089 = 7360^2 + 5467^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84057689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84057683) 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, 1449242 + ... + 1449299.

It is an arithmetic number, because the mean of its divisors is an integer number (21739065).

Almost surely, 2^84057689 is an apocalyptic number.

It is an amenable number.

84057689 is a deficient number, since it is larger than the sum of its proper divisors (2898571).

84057689 is a wasteful number, since it uses less digits than its factorization.

84057689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2898570.

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 84057689 is about 9168.2980427122. The cubic root of 84057689 is about 438.0521490141.

The spelling of 84057689 in words is "eighty-four million, fifty-seven thousand, six hundred eighty-nine".