83576721 has 8 divisors (see below), whose sum is σ = 112422240. Its totient is φ = 55224512.

The previous prime is 83576683. The next prime is 83576741. The reversal of 83576721 is 12767538.

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 83576721 - 2¹⁰ = 83575697 is a prime.

It is a super-2 number, since 2×83576721² = 13970136586223682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 83576721.

It is not an unprimeable number, because it can be changed into a prime (83576741) 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, 122931 + ... + 123608.

It is an arithmetic number, because the mean of its divisors is an integer number (14052780).

Almost surely, 2^83576721 is an apocalyptic number.

It is an amenable number.

83576721 is a deficient number, since it is larger than the sum of its proper divisors (28845519).

83576721 is a wasteful number, since it uses less digits than its factorization.

83576721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246655.

The product of its digits is 70560, while the sum is 39.

The square root of 83576721 is about 9142.0304637427. The cubic root of 83576721 is about 437.2150564703.

The spelling of 83576721 in words is "eighty-three million, five hundred seventy-six thousand, seven hundred twenty-one".