84810069 has 24 divisors (see below), whose sum is σ = 125223384. Its totient is φ = 55296000.

The previous prime is 84810049. The next prime is 84810109. The reversal of 84810069 is 96001848.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16499844 + 68310225 = 4062^2 + 8265^2 .

It is not a de Polignac number, because 84810069 - 2¹¹ = 84808021 is a prime.

It is a super-2 number, since 2×84810069² = 14385495607569522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84810049) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 131989 + ... + 132629.

It is an arithmetic number, because the mean of its divisors is an integer number (5217641).

Almost surely, 2^84810069 is an apocalyptic number.

It is an amenable number.

84810069 is a deficient number, since it is larger than the sum of its proper divisors (40413315).

84810069 is a wasteful number, since it uses less digits than its factorization.

84810069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949 (or 946 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 84810069 is about 9209.2382421132. The cubic root of 84810069 is about 439.3552350468.

The spelling of 84810069 in words is "eighty-four million, eight hundred ten thousand, sixty-nine".