83676721 has 8 divisors (see below), whose sum is σ = 87029120. Its totient is φ = 80381808.

The previous prime is 83676713. The next prime is 83676731. The reversal of 83676721 is 12767638.

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 83676721 - 2³ = 83676713 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83676701) 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, 11391 + ... + 17236.

It is an arithmetic number, because the mean of its divisors is an integer number (10878640).

Almost surely, 2^83676721 is an apocalyptic number.

It is an amenable number.

83676721 is a deficient number, since it is larger than the sum of its proper divisors (3352399).

83676721 is a wasteful number, since it uses less digits than its factorization.

83676721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28743.

The product of its digits is 84672, while the sum is 40.

The square root of 83676721 is about 9147.4980732439. The cubic root of 83676721 is about 437.3893636978.

The spelling of 83676721 in words is "eighty-three million, six hundred seventy-six thousand, seven hundred twenty-one".