8721722 has 8 divisors (see below), whose sum is σ = 13771200. Its totient is φ = 4131324.

The previous prime is 8721701. The next prime is 8721737. The reversal of 8721722 is 2271278.

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

It is a nialpdrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114722 + ... + 114797.

It is an arithmetic number, because the mean of its divisors is an integer number (1721400).

Almost surely, 2^8721722 is an apocalyptic number.

8721722 is a deficient number, since it is larger than the sum of its proper divisors (5049478).

8721722 is a wasteful number, since it uses less digits than its factorization.

8721722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229540.

The product of its digits is 3136, while the sum is 29.

The square root of 8721722 is about 2953.2561690446. The cubic root of 8721722 is about 205.8420412247.

The spelling of 8721722 in words is "eight million, seven hundred twenty-one thousand, seven hundred twenty-two".