84820087 has 16 divisors (see below), whose sum is σ = 95616288. Its totient is φ = 74580480.

The previous prime is 84820081. The next prime is 84820091. The reversal of 84820087 is 78002848.

It is a cyclic number.

It is not a de Polignac number, because 84820087 - 2¹¹ = 84818039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84820081) 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, 41563 + ... + 43555.

It is an arithmetic number, because the mean of its divisors is an integer number (5976018).

Almost surely, 2^84820087 is an apocalyptic number.

84820087 is a deficient number, since it is larger than the sum of its proper divisors (10796201).

84820087 is a wasteful number, since it uses less digits than its factorization.

84820087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2130.

The product of its (nonzero) digits is 28672, while the sum is 37.

The square root of 84820087 is about 9209.7821364026. The cubic root of 84820087 is about 439.3725336511.

The spelling of 84820087 in words is "eighty-four million, eight hundred twenty thousand, eighty-seven".