84309869 has 16 divisors (see below), whose sum is σ = 100041216. Its totient is φ = 69552000.

The previous prime is 84309857. The next prime is 84309877. The reversal of 84309869 is 96890348.

It is not a de Polignac number, because 84309869 - 2⁴ = 84309853 is a prime.

It is a super-2 number, since 2×84309869² = 14216308021594322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84309769) 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, 17969 + ... + 22169.

It is an arithmetic number, because the mean of its divisors is an integer number (6252576).

Almost surely, 2^84309869 is an apocalyptic number.

It is an amenable number.

84309869 is a deficient number, since it is larger than the sum of its proper divisors (15731347).

84309869 is a wasteful number, since it uses less digits than its factorization.

84309869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4316.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 84309869 is about 9182.0405684140. The cubic root of 84309869 is about 438.4897758590.

The spelling of 84309869 in words is "eighty-four million, three hundred nine thousand, eight hundred sixty-nine".