8721626 has 4 divisors (see below), whose sum is σ = 13082442. Its totient is φ = 4360812.

The previous prime is 8721617. The next prime is 8721631. The reversal of 8721626 is 6261278.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 8708401 + 13225 = 2951^2 + 115^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8721592 and 8721601.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2180405 + ... + 2180408.

Almost surely, 2^8721626 is an apocalyptic number.

8721626 is a deficient number, since it is larger than the sum of its proper divisors (4360816).

8721626 is a wasteful number, since it uses less digits than its factorization.

8721626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4360815.

The product of its digits is 8064, while the sum is 32.

The square root of 8721626 is about 2953.2399157535. The cubic root of 8721626 is about 205.8412859875.

The spelling of 8721626 in words is "eight million, seven hundred twenty-one thousand, six hundred twenty-six".