83121771 has 8 divisors (see below), whose sum is σ = 110911120. Its totient is φ = 55373472.

The previous prime is 83121749. The next prime is 83121781. The reversal of 83121771 is 17712138.

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

It is not a de Polignac number, because 83121771 - 2⁶ = 83121707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83121781) 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, 5176 + ... + 13893.

It is an arithmetic number, because the mean of its divisors is an integer number (13863890).

Almost surely, 2^83121771 is an apocalyptic number.

83121771 is a deficient number, since it is larger than the sum of its proper divisors (27789349).

83121771 is a wasteful number, since it uses less digits than its factorization.

83121771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20525.

The product of its digits is 2352, while the sum is 30.

The square root of 83121771 is about 9117.1141815818. The cubic root of 83121771 is about 436.4202856812.

The spelling of 83121771 in words is "eighty-three million, one hundred twenty-one thousand, seven hundred seventy-one".