84684551 has 16 divisors (see below), whose sum is σ = 101274624. Its totient is φ = 69235584.

The previous prime is 84684541. The next prime is 84684569. The reversal of 84684551 is 15548648.

It is a cyclic number.

It is not a de Polignac number, because 84684551 - 2¹⁰ = 84683527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 84684499 and 84684508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84684541) 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, 95030 + ... + 95916.

It is an arithmetic number, because the mean of its divisors is an integer number (6329664).

Almost surely, 2^84684551 is an apocalyptic number.

84684551 is a deficient number, since it is larger than the sum of its proper divisors (16590073).

84684551 is a wasteful number, since it uses less digits than its factorization.

84684551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510.

The product of its digits is 153600, while the sum is 41.

The square root of 84684551 is about 9202.4209314723. The cubic root of 84684551 is about 439.1383810063.

The spelling of 84684551 in words is "eighty-four million, six hundred eighty-four thousand, five hundred fifty-one".