84971231 has 8 divisors (see below), whose sum is σ = 86613504. Its totient is φ = 83337120.

The previous prime is 84971221. The next prime is 84971233. The reversal of 84971231 is 13217948.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84971231 is a prime.

It is a super-2 number, since 2×84971231² = 14440220195310722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 84971191 and 84971200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84971233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21545 + ... + 25181.

It is an arithmetic number, because the mean of its divisors is an integer number (10826688).

Almost surely, 2^84971231 is an apocalyptic number.

84971231 is a deficient number, since it is larger than the sum of its proper divisors (1642273).

84971231 is a wasteful number, since it uses less digits than its factorization.

84971231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4081.

The product of its digits is 12096, while the sum is 35.

The square root of 84971231 is about 9217.9841071679. The cubic root of 84971231 is about 439.6333567584.

The spelling of 84971231 in words is "eighty-four million, nine hundred seventy-one thousand, two hundred thirty-one".