83640129 has 8 divisors (see below), whose sum is σ = 111726240. Its totient is φ = 55657056.

The previous prime is 83640103. The next prime is 83640143. The reversal of 83640129 is 92104638.

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

It is not a de Polignac number, because 83640129 - 2⁹ = 83639617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 83640129.

It is not an unprimeable number, because it can be changed into a prime (83640149) 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, 23844 + ... + 27125.

It is an arithmetic number, because the mean of its divisors is an integer number (13965780).

Almost surely, 2^83640129 is an apocalyptic number.

It is an amenable number.

83640129 is a deficient number, since it is larger than the sum of its proper divisors (28086111).

83640129 is a wasteful number, since it uses less digits than its factorization.

83640129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51519.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 83640129 is about 9145.4977447922. The cubic root of 83640129 is about 437.3255973162.

The spelling of 83640129 in words is "eighty-three million, six hundred forty thousand, one hundred twenty-nine".