83775921 has 8 divisors (see below), whose sum is σ = 117580320. Its totient is φ = 52911072.

The previous prime is 83775917. The next prime is 83775943. The reversal of 83775921 is 12957738.

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

It is not a de Polignac number, because 83775921 - 2² = 83775917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83775721) 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, 734820 + ... + 734933.

It is an arithmetic number, because the mean of its divisors is an integer number (14697540).

Almost surely, 2^83775921 is an apocalyptic number.

It is an amenable number.

83775921 is a deficient number, since it is larger than the sum of its proper divisors (33804399).

83775921 is a wasteful number, since it uses less digits than its factorization.

83775921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1469775.

The product of its digits is 105840, while the sum is 42.

The square root of 83775921 is about 9152.9187148144. The cubic root of 83775921 is about 437.5621393098.

The spelling of 83775921 in words is "eighty-three million, seven hundred seventy-five thousand, nine hundred twenty-one".