84904869 has 16 divisors (see below), whose sum is σ = 129508992. Its totient is φ = 48468288.

The previous prime is 84904849. The next prime is 84904873. The reversal of 84904869 is 96840948.

It is not a de Polignac number, because 84904869 - 2¹³ = 84896677 is a prime.

It is a super-2 number, since 2×84904869² = 14417673559814322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84904849) 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, 35227 + ... + 37559.

It is an arithmetic number, because the mean of its divisors is an integer number (8094312).

Almost surely, 2^84904869 is an apocalyptic number.

It is an amenable number.

84904869 is a deficient number, since it is larger than the sum of its proper divisors (44604123).

84904869 is a wasteful number, since it uses less digits than its factorization.

84904869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4076.

The product of its (nonzero) digits is 497664, while the sum is 48.

The square root of 84904869 is about 9214.3838101091. The cubic root of 84904869 is about 439.5188766498.

The spelling of 84904869 in words is "eighty-four million, nine hundred four thousand, eight hundred sixty-nine".