84115487 has 4 divisors (see below), whose sum is σ = 85180320. Its totient is φ = 83050656.

The previous prime is 84115483. The next prime is 84115513. The reversal of 84115487 is 78451148.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 84115487 - 2² = 84115483 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 84115487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84115481) 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, 532298 + ... + 532455.

It is an arithmetic number, because the mean of its divisors is an integer number (21295080).

Almost surely, 2^84115487 is an apocalyptic number.

84115487 is a deficient number, since it is larger than the sum of its proper divisors (1064833).

84115487 is a wasteful number, since it uses less digits than its factorization.

84115487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064832.

The product of its digits is 35840, while the sum is 38.

The square root of 84115487 is about 9171.4495582759. The cubic root of 84115487 is about 438.1525274472.

The spelling of 84115487 in words is "eighty-four million, one hundred fifteen thousand, four hundred eighty-seven".