84109129 has 8 divisors (see below), whose sum is σ = 91671552. Its totient is φ = 76702800.

The previous prime is 84109127. The next prime is 84109147. The reversal of 84109129 is 92190148.

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

It is a cyclic number.

It is not a de Polignac number, because 84109129 - 2¹ = 84109127 is a prime.

It is a super-2 number, since 2×84109129² = 14148691162277282, 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 = 84109094 and 84109103.

It is not an unprimeable number, because it can be changed into a prime (84109121) 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, 37897 + ... + 40054.

It is an arithmetic number, because the mean of its divisors is an integer number (11458944).

Almost surely, 2^84109129 is an apocalyptic number.

It is an amenable number.

84109129 is a deficient number, since it is larger than the sum of its proper divisors (7562423).

84109129 is a wasteful number, since it uses less digits than its factorization.

84109129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78047.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 84109129 is about 9171.1029325812. The cubic root of 84109129 is about 438.1414876888.

The spelling of 84109129 in words is "eighty-four million, one hundred nine thousand, one hundred twenty-nine".