80703721 has 8 divisors (see below), whose sum is σ = 92640960. Its totient is φ = 68868528.

The previous prime is 80703719. The next prime is 80703739. The reversal of 80703721 is 12730708.

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 80703721 - 2¹ = 80703719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80703721.

It is not an unprimeable number, because it can be changed into a prime (80703751) 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, 23806 + ... + 26983.

It is an arithmetic number, because the mean of its divisors is an integer number (11580120).

Almost surely, 2^80703721 is an apocalyptic number.

It is an amenable number.

80703721 is a deficient number, since it is larger than the sum of its proper divisors (11937239).

80703721 is a wasteful number, since it uses less digits than its factorization.

80703721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51023.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 80703721 is about 8983.5249763108. The cubic root of 80703721 is about 432.1466855125.

The spelling of 80703721 in words is "eighty million, seven hundred three thousand, seven hundred twenty-one".