84857229 has 6 divisors (see below), whose sum is σ = 122571566. Its totient is φ = 56571480.

The previous prime is 84857221. The next prime is 84857233. The reversal of 84857229 is 92275848.

It can be written as a sum of positive squares in only one way, i.e., 51194025 + 33663204 = 7155^2 + 5802^2 .

It is not a de Polignac number, because 84857229 - 2³ = 84857221 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 (84857221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4714282 + ... + 4714299.

Almost surely, 2^84857229 is an apocalyptic number.

It is an amenable number.

84857229 is a deficient number, since it is larger than the sum of its proper divisors (37714337).

84857229 is a wasteful number, since it uses less digits than its factorization.

84857229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9428587 (or 9428584 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 84857229 is about 9211.7983586268. The cubic root of 84857229 is about 439.4366568000.

The spelling of 84857229 in words is "eighty-four million, eight hundred fifty-seven thousand, two hundred twenty-nine".