83129661 has 12 divisors (see below), whose sum is σ = 120219840. Its totient is φ = 55353480.

The previous prime is 83129653. The next prime is 83129687. The reversal of 83129661 is 16692138.

It is not a de Polignac number, because 83129661 - 2³ = 83129653 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83129611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3130 + ... + 13268.

It is an arithmetic number, because the mean of its divisors is an integer number (10018320).

Almost surely, 2^83129661 is an apocalyptic number.

It is an amenable number.

83129661 is a deficient number, since it is larger than the sum of its proper divisors (37090179).

83129661 is a wasteful number, since it uses less digits than its factorization.

83129661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11056 (or 11053 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 83129661 is about 9117.5468740226. The cubic root of 83129661 is about 436.4340937248.

The spelling of 83129661 in words is "eighty-three million, one hundred twenty-nine thousand, six hundred sixty-one".