84020487 has 4 divisors (see below), whose sum is σ = 112027320. Its totient is φ = 56013656.

The previous prime is 84020483. The next prime is 84020491. The reversal of 84020487 is 78402048.

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

It is an interprime number because it is at equal distance from previous prime (84020483) and next prime (84020491).

It is a cyclic number.

It is not a de Polignac number, because 84020487 - 2² = 84020483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84020483) 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, 14003412 + ... + 14003417.

It is an arithmetic number, because the mean of its divisors is an integer number (28006830).

Almost surely, 2^84020487 is an apocalyptic number.

84020487 is a deficient number, since it is larger than the sum of its proper divisors (28006833).

84020487 is a wasteful number, since it uses less digits than its factorization.

84020487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28006832.

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 84020487 is about 9166.2689792521. The cubic root of 84020487 is about 437.9875155425.

The spelling of 84020487 in words is "eighty-four million, twenty thousand, four hundred eighty-seven".