80721113 has 8 divisors (see below), whose sum is σ = 88548096. Its totient is φ = 72975600.

The previous prime is 80721097. The next prime is 80721133. The reversal of 80721113 is 31112708.

It is a happy number.

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 80721113 - 2⁴ = 80721097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80721133) 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, 18281 + ... + 22262.

It is an arithmetic number, because the mean of its divisors is an integer number (11068512).

Almost surely, 2^80721113 is an apocalyptic number.

It is an amenable number.

80721113 is a deficient number, since it is larger than the sum of its proper divisors (7826983).

80721113 is a wasteful number, since it uses less digits than its factorization.

80721113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40735.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 80721113 is about 8984.4929183566. The cubic root of 80721113 is about 432.1777264411.

The spelling of 80721113 in words is "eighty million, seven hundred twenty-one thousand, one hundred thirteen".